How to Clean an Infrared Sauna: Maintenance & Care Guide
Keep your infrared sauna hygienic, odor-free, and performing at its best with these simple cleaning and maintenance tips.
Clean an infrared sauna by wiping benches and backrests with a dry or lightly dampened microfiber cloth after every session, leaving the door open for at least 15 to 20 minutes to ventilate. Weekly, apply a one-part vinegar to ten-parts water solution to wood surfaces only, keeping all liquids away from heating panels, which need only a dry cloth.
- No Steam Means No Self-Cleaning: Without a steam cycle to rinse surfaces, sweat sits exactly where it lands and feeds bacteria that ventilation alone will not clear.
- Leave the door open fifteen to twenty minutes, then wipe benches and floor with a dry microfiber cloth before any residue can soak into the wood.
- That ratio is enough to handle bacteria and odor on sauna wood without saturating it or leaving residues that off-gas during your next session.
- Discolored bench wood gets a light sanding in two stages to remove the stained layer, which is normal maintenance the wood is designed to handle.
- Oils and Sprays Cause Damage: Commercial sprays off-gas at sauna temperatures, and essential oils applied directly to wood create sticky buildup that attracts more residue over time.
Where to start
Finnmark 4 Person FD-6 Traditional-Infrared Hybrid Barrel Sauna
Dynamic Saunas Serena 2 Person Full Spectrum Infrared Sauna (DYN-6229-03 FS)
Why Cleaning an Infrared Sauna Is Different from Other Saunas
Infrared saunas sweat differently than traditional ones, and that changes what cleaning actually involves. Because the heat comes from panels rather than a stove and water, there is no steam cycle to briefly sanitize the air or rinse surfaces. What you get instead is dry, concentrated radiant heat that draws out a lot of sweat, and that sweat stays exactly where it lands until you wipe it away.
That matters for two reasons. First, sweat left on untreated wood feeds bacteria and eventually causes odor that no amount of ventilation will fix. Second, many infrared cabins use softwoods like Canadian hemlock or Western Canadian cedar, which are naturally antimicrobial to a degree but are also porous. The Finnmark FD-1, for example, uses an antimicrobial Western Canadian cedar interior that resists mold and bacteria, which gives you a head start, but it does not make cleaning optional. The wood still absorbs oils and moisture over time, and a routine keeps that absorption from becoming a problem.
Traditional saunas, by contrast, typically run much hotter and drier between uses, which discourages some microbial growth on its own. Infrared units sit at lower operating temperatures, generally between 120 and 170 degrees Fahrenheit depending on the model, so the environment between sessions is milder and more hospitable to bacteria if surfaces are left damp. Understanding that difference is the starting point for building a cleaning habit that actually works.
What to Do After Every Single Session
Most of the work happens right after you step out, not once a week. Cooling-down cleaning takes about five minutes and prevents the buildup that makes deep cleaning so much harder later.
Leave the door open for at least fifteen to twenty minutes after each session. This lets residual heat escape and allows any moisture on the wood to evaporate before it has a chance to soak in. If your unit has an interior ventilation system or a built-in fan, run it during this window.
Once the bench surface is cool enough to touch comfortably, wipe it down with a dry or very lightly dampened microfiber cloth. Focus on the areas where you sat or reclined, since those absorb the highest sweat load. Do the same for the backrest panels and the floor section beneath your feet. A quick pass now saves you from scrubbing hardened residue later.
Using a towel during your session makes this step much easier. Placing a clean towel on the bench and a second one on the floor is standard practice in higher-use scenarios and dramatically reduces the amount of sweat that reaches the wood directly. It is a simple habit that extends the life of the interior finish considerably.
The Weekly Cleaning Routine: Surfaces, Benches, and Panels
Once a week, or more frequently if multiple people are using the sauna daily, the interior needs a proper wipe-down rather than just a post-session pass. The goal is to remove accumulated body oils, any light discoloration from sweat, and anything that has settled on the infrared panels themselves.
Cleaning the Wood Surfaces
The safest cleaning agent for sauna wood is a mild solution of water with a small amount of white vinegar, roughly one part vinegar to ten parts water. This is enough to address bacteria and odors without saturating the wood or introducing chemical residues that would off-gas during your next session. Apply it to your cloth first, then wipe the surface. Never spray liquid directly onto sauna wood.
Avoid any cleaner that contains bleach, ammonia, or strong alcohol. These strip the natural oils from the wood and can lighten or dry out the grain permanently. They also leave residues that you really do not want to be sitting in at 140 degrees. Some manufacturers specifically warn against commercial cleaning sprays, and that guidance is worth taking seriously with any model you own.
Pay particular attention to the lower bench, the floor panels, and the interior door frame. These areas collect the most body contact and also the most foot traffic. The floor is often overlooked, but it accumulates oils and dead skin cells that contribute to odor faster than any other surface.
Cleaning the Infrared Panels
The heating panels themselves need a gentler approach. Power the unit off completely and let it cool before touching the panels. Use a dry microfiber cloth to dust the panel surface. If there is visible residue from sweat splatter, a cloth barely dampened with plain water is fine. No cleaning solution should contact the panel face directly, and you should never spray anything toward the heater elements.
Full-spectrum models like the Finnmark FD-1 combine short-wave Spectrum Plus panels with carbon 360 long-wave heaters. The panel faces on these units are not interchangeable with the wood benches in terms of cleaning method. The distinction matters because some people apply the same diluted vinegar solution across every surface, which is fine for wood but not ideal for the panel housing. Stick to dry or barely damp cloths on the heater components.
The Dynamic Saunas Serena, which uses seven heaters including five PureTech carbon panels and two near-infrared elements, has multiple panel faces distributed across the interior. Give each one a quick inspection during your weekly clean. Dust accumulation on carbon panels can subtly affect heat distribution over time, so keeping them clear is both a hygiene and a performance habit.
Monthly Deep Clean: What Most People Skip
Monthly maintenance goes a level deeper than the weekly routine and addresses the parts of the sauna that do not get touched every session. This is also when you should check for any signs of issues that daily use might obscure.
Sand lightly if discoloration has developed
Wood benches in higher-use saunas often develop gray or brown discoloration from sweat absorption over time. Light sanding with 120-grit sandpaper followed by 180-grit removes the stained layer and brings fresh wood to the surface. This is entirely normal, and the wood is designed to be renewed this way. Wipe away all dust before the next session and allow the sanded surface to dry completely.
Clean the door and glass
Tempered glass doors, which appear across a wide range of models from the Finnmark FD-1 to the Dynamic Saunas Serena, collect fingerprints, condensation marks, and occasional splash from water bottles. A small amount of diluted white vinegar on a microfiber cloth works well here. Dry thoroughly afterward to prevent streaking. Check the door seal while you are at it. A compromised seal allows heat to escape and increases the load on your heaters over every subsequent session.
Inspect the floor drainage or ventilation points
Some outdoor and larger indoor units include a floor drainage system to simplify cleaning, as seen in certain cabin-style models. Even without a drain, check the floor corners and the gap between floor panels for debris accumulation. Use a dry brush or vacuum with a soft attachment to clear anything that has collected there.
Check the control panel and connections
Wipe the exterior of the control panel with a dry cloth. For units with touchscreen controls or Wi-Fi interfaces, like the Finnmark FD-6, follow the manufacturer's cleaning guidance for the screen specifically. Do not apply any liquid to the control panel area. While you are at the unit's exterior, visually check the power cord connection and any ventilation grilles on the exterior housing for dust buildup.
Air out the interior for several hours
After your monthly clean, leave the door fully open for a minimum of two to three hours before the next session. This extended airing allows any residual moisture from cleaning to fully evaporate and lets the wood breathe. If you can do this on a dry day with good airflow through the room, that is ideal.
Products and Practices That Damage Infrared Saunas
The list of things you should not do is almost as useful as the list of things you should. Several common cleaning habits that work fine elsewhere will cause real damage inside an infrared sauna.
- Do not use commercial all-purpose sprays, antibacterial sprays, or anything with synthetic fragrance. These leave residues that off-gas at sauna temperatures and can irritate airways during sessions.
- Do not use essential oils directly on the wood as a cleaning agent or freshener. Oils accelerate darkening of the wood grain and can create sticky patches that attract more residue over time. If you want aromatherapy, use a purpose-built sauna diffuser that keeps the oil away from wood surfaces entirely.
- Do not use a wet mop or any standing water on the floor panels. Unlike a traditional sauna that is built to handle water and steam, an infrared cabin's floor panels are not sealed for that level of moisture. Excessive water exposure can cause panels to warp or separate at the joints.
- Do not apply sealants, varnishes, or wood conditioners to the interior surfaces. The wood inside is intentionally untreated so it can breathe and so it does not release volatile compounds when heated. A sealed wood surface defeats both of those purposes.
- Do not clean the infrared panels while the unit is powered on or still warm. Carbon panels and near-infrared elements operate at elevated temperatures and should only be touched when cool and unplugged.
Dealing with Odor: What It Means and How to Fix It
A properly maintained infrared sauna should have a mild, pleasant cedar or wood smell, not a sour or musty one. If you are noticing persistent odor, it usually points to one of three things: sweat that was not wiped away promptly and has been absorbed into the bench surface, moisture that was trapped when the door was closed too soon after a session, or a spot on the floor that has been missed during regular cleaning.
The vinegar-and-water solution is effective at neutralizing odor-causing bacteria on wood surfaces. For more stubborn odor, a paste made from baking soda and a small amount of water can be applied to the affected area, left for ten to fifteen minutes, and then wiped away with a damp cloth. Follow with a dry cloth pass and allow the area to air out completely before running the unit again.
If the odor seems to be coming from the heating session itself rather than from the wood, the most common cause is something on or near the panels, a residue from cleaning product, a forgotten item left on the bench, or dust on the panel face that is burning off. A thorough wipe-down of the panels followed by one or two short burn-off sessions with the door ajar and no one inside usually resolves this.
Long-Term Wood Care: Keeping the Interior in Good Shape
The wood interior of an infrared sauna is both the structural element and the finish, which means caring for it is caring for the whole unit. The good news is that sauna-grade woods are resilient by nature. Western Canadian cedar, used in the Finnmark FD-1, has natural antimicrobial properties and handles temperature cycling well. The Finnmark FD-1 also uses a Thermal Plus Aspen exterior that has been organically treated with heat and steam to resist rot, warping, and decay, which speaks to how seriously the engineering accounts for long-term durability.
For indoor models, the ambient humidity of the room matters. Very dry environments can cause wood to contract and develop small cracks along the grain over years of use. If you live somewhere with very low indoor humidity in winter, allowing occasional brief sessions that vent some warm air into the room is a harmless way to equalize conditions. For outdoor cabin and barrel-style saunas, check the exterior finish seasonally and reapply any exterior protective coating as the manufacturer recommends, though interior surfaces should remain untreated.
Bench covers or removable bench inserts are a practical long-term investment. They absorb sweat before it reaches the wood and can be laundered between sessions. This is particularly useful in a household where the sauna is used by multiple people regularly, or in situations where the same person uses it daily. Several users report that bench covers extend the interval between light sanding significantly.
Cleaning Hybrid Saunas: When There Is Also a Steam Component
Hybrid saunas that combine infrared panels with a traditional steam heater introduce a few additional cleaning considerations. Models like the Finnmark FD-6 and FD-7 barrel saunas run both modes, and the steam cycle does deposit moisture on every interior surface in a way that a pure infrared session does not. After any session where steam was used, the post-session airing period should be extended to at least thirty minutes, and the bench and floor wipe-down becomes more important, not optional.
The sauna rocks used in the steam heater accumulate mineral deposits and organic residue over time. These should be inspected every few months and replaced when they show significant cracking or surface degradation. Crumbling rocks produce dust that settles on every interior surface. Rinsing intact rocks under clean water once or twice a year removes surface buildup without damaging them. If you are browsing saunas for a hybrid model, factor in this additional maintenance step alongside the standard infrared cleaning routine.
The glass on hybrid units also accumulates mineral deposits more quickly than on a pure infrared model, especially if your water has high mineral content. A diluted white vinegar solution on the glass surface, allowed to sit for a minute before wiping, dissolves most of this buildup. If deposits have hardened over time, a second application usually handles them without any need for abrasive tools.
Putting It Together: A Practical Maintenance Schedule
Cleaning an infrared sauna is not complicated, but the timing matters as much as the method. Here is how the rhythm works across the different intervals.
- After every session: leave door open 15 to 20 minutes, wipe benches and floor with a dry microfiber cloth, remove any towels used during the session.
- Weekly: wipe all wood surfaces with diluted white vinegar solution on a cloth, dust infrared panels with a dry cloth, check the glass door for smudges or residue.
- Monthly: inspect and sand any discolored bench areas if needed, clean glass and door seal thoroughly, check floor corners and ventilation points, inspect the control panel exterior, run an extended airing period after cleaning.
- Seasonally (for hybrid or outdoor units): inspect sauna rocks, check exterior finish, confirm that all panel connections and door hardware are functioning correctly.
A unit like the Dynamic Saunas Serena, which is rated for indoor use only and runs on a standard 120V plug, has a relatively contained maintenance profile. Keeping it clean is mostly a matter of those post-session wipe-downs and the weekly pass. The Finnmark barrel saunas, which are designed for outdoor installation and handle both infrared and traditional heating, require the additional seasonal checks that any outdoor structure warrants.
The comparison between a one-person and a two-person infrared sauna is usually framed around space and sharing, but it matters for cleaning too. A two-person unit used by two people daily accumulates twice the sweat load on the benches and floors. If that describes your household, shift the weekly routine to twice a week. The schedule above is a minimum, not a ceiling.
For anyone adding a sauna to an existing recovery setup, the cold plunges in a contrast therapy pairing also require their own water management and sanitation routine, which is worth planning alongside the sauna maintenance so neither gets neglected. The two habits reinforce each other: both require consistent attention to surfaces and water or wood contact points, and building them into the same post-workout routine makes it easier to stay consistent with both.
If you are still in the decision phase and weighing different configurations, understanding how barrel-style designs compare to cabin-style units in terms of interior volume and surface area can shape your maintenance expectations. How a barrel sauna compares to a traditional sauna room in construction and use is a useful reference point, since the curved interior of a barrel model means less flat bench surface relative to total volume, which can actually simplify the wiping routine. The choice of shape affects more than aesthetics.
More saunas worth a look
Finnmark 4 Person FD-7 Traditional-Infrared Hybrid Barrel Sauna
Finnmark FD-1 Infrared Sauna for 1 Person - Full Spectrum with UL Listed Heaters
Frequently asked questions
Is an infrared sauna suitable for someone who wants to use it daily without spending a lot of time on upkeep?▾
Daily use is absolutely workable, but it does require a small post-session habit each time. Leaving the door open for 15 to 20 minutes after every session and wiping the bench with a microfiber cloth takes about five minutes. If you skip that consistently, sweat soaks into the wood and the odor becomes very hard to reverse.
Are there any safety precautions to follow when cleaning the heating panels?▾
Always power the unit off completely and let it cool before touching the panels. Use a dry microfiber cloth only, or one barely dampened with plain water if there is visible residue. No cleaning solution should contact the panel face, and you should never spray anything toward the heater elements.
How much does it cost to maintain an infrared sauna over time?▾
The day-to-day costs are minimal. You need microfiber cloths, white vinegar, and water, which together cost very little. The larger expense consideration is replacement parts or panel servicing if maintenance is neglected long enough to cause damage, which is exactly what a consistent cleaning routine helps you avoid.
How do I set up a simple cleaning routine from day one?▾
Keep a dedicated stack of microfiber towels next to the sauna and place one on the bench and one on the floor during every session. After each use, leave the door open for 15 to 20 minutes, then wipe down the bench, backrest panels, and floor. Bump that up to a full interior wipe-down with a diluted vinegar solution (one part vinegar to ten parts water applied to the cloth, not sprayed on the wood) once a week.
What are the ongoing running costs of an infrared sauna beyond cleaning supplies?▾
Running costs are mainly electricity. Models like the Dynamic Saunas Serena operate on a standard 120V/15 amp outlet, while the Finnmark FD-1 also runs on a standard home outlet, which keeps electricity draw relatively modest compared to traditional saunas requiring 240V service. Actual electricity cost depends on your local rate and how often you use the unit.
What does monthly maintenance involve beyond the weekly wipe-down?▾
The monthly clean goes deeper than the weekly routine, covering surfaces that do not get touched every session and checking for early signs of problems that daily use might obscure. This is the point where you inspect panel faces more carefully for dust buildup, check the floor panels thoroughly, and address any light discoloration on the interior door frame or lower bench that has accumulated over several weeks.
How do I know what size infrared sauna is right for my household?▾
Capacity is the clearest starting point. The Finnmark FD-1 is a one-person unit suited to solo daily use, while the Dynamic Saunas Serena accommodates two people. The Finnmark FD-6 and FD-7 are both four-person models with significantly larger interiors, including 135 cubic feet of interior space on the FD-7. If multiple family members want to use the sauna regularly, stepping up to a four-person unit reduces scheduling conflicts and is easier to justify from a per-use-cost perspective.
What are the most common cleaning mistakes infrared sauna owners make?▾
The biggest one is using commercial cleaning sprays that contain bleach, ammonia, or strong alcohol. These strip the natural oils from the wood and leave residues that off-gas during sessions, which is a problem when you are sitting at temperatures up to 140 degrees or higher. Applying the same cleaning solution to both the wood and the heater panel faces is another frequent error. Wood and panel components need different approaches, and treating them identically can affect panel performance over time.
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