Short answer: Infrared saunas require minimal maintenance — wipe down surfaces with a damp cloth after each use, deep clean monthly, and inspect electrical components annually. With proper care, a quality infrared sauna lasts 20+ years. Here's exactly what to do and how often.
Why Maintenance Matters
Unlike steam rooms or traditional saunas, infrared saunas don't use water — which dramatically reduces mold risk. But sweat, body oils, and wood oxidation still require regular attention. Neglecting cleaning leads to:
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Odor buildup from bacteria in sweat residue
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Wood staining and darkening from oils
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Heater efficiency loss from dust accumulation
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Warranty issues if damage results from neglect
The good news: 5 minutes after each session keeps your sauna in pristine condition for decades.
Quick-Clean After Every Session (5 Minutes)
Step 1: Air it out
Leave the door open for 10–15 minutes after every session. This releases residual moisture and heat, preventing any mold or bacterial growth in the wood grain.
Step 2: Wipe down benches and backrests
Use a clean, dry microfiber towel or a lightly damp cloth. Focus on areas where you were sitting or leaning. Do not use soap or chemical cleaners for daily wipe-downs — they strip the wood's natural properties.
Step 3: Hang your towels outside the sauna
Wet towels left inside create humidity. Hang them outside to dry after every session.
Optional but recommended: Place a sauna towel on the bench during your session. This absorbs sweat directly and reduces how much contacts the wood. Wash these regularly.
Weekly Maintenance Checklist
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[ ] Wipe all interior wood surfaces (benches, walls, floor) with a dry cloth
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[ ] Check floor for any moisture accumulation
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[ ] Inspect heater panels for dust — blow out with compressed air if needed
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[ ] Confirm door seal is snug (no heat escaping from edges)
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[ ] Check that control panel display is functioning correctly
Monthly Deep Clean
Interior Wood
Mix a 1:10 solution of white vinegar and water in a spray bottle. Lightly mist the wood surfaces, then wipe immediately with a clean cloth. Do not saturate the wood.
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Kills bacteria without chemicals
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Neutralizes odors
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Safe for hemlock, cedar, and basswood
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Dries quickly and leaves no residue
Do NOT use: Bleach, ammonia, hydrogen peroxide, commercial wood cleaners, or essential oils directly on wood (they can damage the grain and may off-gas when heated).
Heater Panels
Wipe the ceramic or carbon fiber heater panels with a dry microfiber cloth. If dust has built up, use a soft brush attachment on a vacuum (low suction) or a can of compressed air.
Never spray liquids on heater panels and never clean them while the sauna is plugged in.
Floor
If your sauna has a removable floor mat, remove and wash it monthly. For wood floors, wipe with the vinegar solution and allow to dry fully before next use.
Door Glass
Clean with a standard glass cleaner (Windex or similar). Spray onto the cloth, not directly on the glass.
Exterior Cabinet
Wipe with a slightly damp cloth. If your sauna is in a garage or humid environment, inspect the exterior for any signs of warping or water intrusion quarterly.
Annual Maintenance: What to Inspect
Once per year (or every 6 months with heavy use), do a full inspection:
Electrical Connections
Visually inspect the power cord, heater connections, and control panel wiring for any fraying, discoloration, or loose connections. If you see any of these — stop using the sauna and contact your manufacturer immediately.
Heater Performance
Infrared heaters (both ceramic and carbon fiber) lose efficiency very slowly over time. If your sauna takes noticeably longer to reach temperature than it used to, or if some panels feel cooler than others, one heater may need replacement.
Wood Condition
Look for:
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Cracks or warping (minor surface cracking is normal as wood ages)
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Dark staining from oils (addressable with light sanding — see below)
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Any soft spots indicating moisture infiltration
Door Hinges and Hardware
Tighten any loose screws. Lubricate hinges with a dry lubricant (not WD-40 or oil-based products that off-gas when heated).
Dealing With Common Problems
Yellow or Brown Staining on Benches
Caused by body oils and sweat soaking into the wood over time. Treatment: 1. Lightly sand with 220-grit sandpaper 2. Wipe away sawdust completely 3. Allow to dry 4. Treat with a food-safe mineral oil (optional — 1 thin coat, fully absorbed before use)
Persistent Odors
If vinegar cleaning doesn't resolve odor: 1. Run the sauna empty at full heat for 30–45 minutes 2. Leave door open to vent 3. Repeat for 2–3 sessions This burns off residual bacteria and oils. Called a "heat purge" — useful for new saunas too (factory odors) and after periods of non-use.
Mold or Mildew
Rare in infrared saunas due to low humidity, but possible if wet towels were stored inside or the sauna is in a very humid environment. Address immediately: 1. Mix 1 part white vinegar with 1 part water 2. Apply to affected area, let sit 10 minutes 3. Scrub with a soft brush 4. Dry thoroughly 5. Run a heat purge session
If mold has penetrated deeply into wood grain, that section may need replacement — contact your manufacturer.
Heater Not Heating Properly
Before calling support:
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Check that the circuit breaker hasn't tripped
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Confirm the control panel shows the correct temperature setting
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Ensure the sauna has had adequate pre-heat time (most infrared saunas reach operating temperature in 10–20 minutes)
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If one side heats and the other doesn't, a single heater panel may have failed — this is usually covered under warranty
Wood Type Maintenance Differences
Canadian Hemlock (Peak Saunas standard) Naturally resistant to odor absorption. Very stable, minimal warping. Light-colored — shows less staining than cedar. Clean with vinegar solution monthly.
Western Red Cedar More aromatic, more porous. Absorbs oils faster — clean benches more frequently (after every 3–4 uses). The natural oils in cedar have antibacterial properties, so deep cleaning is needed less often for the wood itself.
Basswood Lightest color, least allergenic. Good for sensitive individuals. Similar care to hemlock. Very stable — low maintenance.
What Voids Your Warranty
Most manufacturers (including Peak Saunas) void warranties when damage results from:
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Using cleaning products not approved for use in infrared saunas
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Water damage from improper use (steam generators, excessive water on stones)
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Electrical modifications
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Physical damage from impacts
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Use outdoors if not rated for outdoor installation
Keep your receipt and register your warranty on day one.
Seasonal Storage (If Applicable)
If storing your sauna during part of the year: 1. Run a heat purge before storing 2. Leave door slightly ajar (prevents musty air buildup) 3. Cover exterior if in a dusty environment (garage) 4. Disconnect power 5. Re-run heat purge before first use after storage
Cleaning Products to Always Avoid
| Product | Why to Avoid |
|---|---|
| Bleach | Damages wood fibers, releases chlorine gas when heated |
| Ammonia cleaners | Toxic off-gassing at sauna temperatures |
| Rubbing alcohol | Dries and cracks wood grain |
| Essential oils (direct) | Can warp and stain wood; flammable |
| Oil-based wood polish | Seals pores, creates slippery surfaces, off-gases |
| Commercial bathroom cleaners | Chemical residue harmful when inhaled during use |
Stick to: White vinegar solution, dry microfiber cloths, compressed air for heaters.
FAQ
How often should I clean my infrared sauna? Wipe down after every session (5 minutes). Deep clean with vinegar solution monthly. Full inspection annually.
Can I use a pressure washer or hose? Never. Infrared saunas are not waterproof and contain electrical components. Water intrusion can cause electrical hazards and irreparable wood damage.
How do I get rid of the "new sauna" smell? Run 3–5 heat purge sessions (empty sauna at full heat for 30–45 min, door open after). Most factory odors dissipate within the first 5–10 uses.
Should I oil or seal the wood? Generally no. Natural wood breathes — sealing it traps sweat and bacteria. If the wood looks very dry after years of use, a single application of food-safe mineral oil (fully absorbed, not on heater-facing surfaces) is acceptable.
Can I use a UV sanitizer inside my sauna? UV-C wands are fine for supplemental sanitization. They don't replace regular cleaning but can help between deep cleans. Keep the lamp away from heater panels and control electronics.
How long do infrared heaters last? Carbon fiber heaters: typically 30,000–50,000 hours. Ceramic heaters: 10,000–20,000 hours. At daily 45-minute use, quality heaters should last 10–20+ years. Peak Saunas uses low-maintenance carbon fiber technology.