Table of contents13 sections
Sauna maintenance is mostly routine. The details differ between infrared and traditional, and between indoor and outdoor, but every sauna benefits from the same short list: dry it, clean it, inspect it.
Always follow the manufacturer's care guide. This is a general overview, not a substitute for it.
Cleaning benches and interior surfaces
Wipe benches with a damp cloth and a mild, sauna-safe cleaner. Avoid abrasive scrubs, bleach-heavy products and strong solvents on unfinished or oiled wood.
Clean glass doors with a standard glass cleaner, but keep liquids away from the heater and electrical parts.
Proper ventilation after use
Open the door and any vents after a session so warm, humid air can leave. This is the single most effective way to prevent musty smells and long-term moisture damage.
Moisture management
Use a towel on the bench and a floor mat for wet feet. Don't store damp towels inside. Outdoors, check that water drains away from the base rather than pooling underneath.
Wood care
Outdoor timber needs refinishing as the finish wears — check annually and refinish when water stops beading. Indoors, light sanding of darkened areas is usually enough.
Keep an eye on door seals and hinges; a poorly sealed door loses heat and lets moisture in.
Heater maintenance
Check that the heater is free of dust and debris, and that nothing has been placed on it. Test the controller at the start of each season.
If you notice burning smells, tripping breakers or failure to reach temperature, stop using it and call an electrician.
Sauna stone inspection
Inspect stones every few months. Replace cracked or crumbling stones, and never pour water directly onto electric elements — the stones absorb it and release steam.
Keep the stone load at the manufacturer's recommended weight for best performance.
Infrared heater maintenance
Don't splash water on infrared panels. Keep panels clear of towels and furniture, and dust them gently according to the maker's instructions.
Look for any cracked panels or loose fixings before each season and have them checked if you notice changes.
Outdoor weather protection
Check roof, flashing and door seals after storms. Keep gutters clear on cabin roofs. In winter, remove heavy snow from the roof if the manufacturer advises it.
Refinish exterior timber before damage sets in, not after.
Mold prevention
- Dry the sauna after every use.
- Maintain ventilation and airflow.
- Fix leaks and seal issues quickly.
- Avoid storing damp items inside.
Seasonal maintenance
At the start of heavy-use season, check the heater, stones, controls and lighting. At the end of summer, inspect outdoor timber, roof and seals.
Common maintenance mistakes
- Leaving the door closed on a wet sauna.
- Using harsh cleaners on wood.
- Ignoring cracked stones until they crumble into the heater.
- Never checking door seals.
- Refinishing outdoor wood too late.
When to contact a professional
- Any electrical fault or burning smell.
- Water ingress or suspected rot.
- A heater that won't heat or trips the breaker.
- Structural movement or loosening bands on a barrel.
Maintenance schedule
| When | What to do |
|---|---|
| After every use | Dry benches, open door and vents, hang towels |
| Weekly | Wipe benches, floor and door |
| Monthly | Clean glass, check vents, inspect for damage |
| Seasonally | Check stones, seals, bands, roof; test heater |
| Annually | Refinish exterior wood; service heater and controls |
Frequently asked questions
How often should sauna stones be replaced?+
Inspect them every few months and replace cracked or crumbling stones. Many owners replace the full set every few years depending on use.
Can I use bleach in a sauna?+
No. Stick to mild sauna-safe cleaners. Bleach and harsh solvents can damage wood and are unnecessary for routine cleaning.
Do infrared saunas need ventilation too?+
Yes. Even though they run cooler, ventilation helps remove humidity from the body and keeps the cabin fresh.
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