A well-maintained sauna can last for decades, providing thousands of relaxing sessions. However, neglecting basic care can lead to premature wear, unpleasant odours, and even safety hazards. The good news is that sauna maintenance doesn't require much time or effort when done consistently.
This comprehensive guide covers everything from quick daily habits to seasonal deep cleaning, ensuring your investment stays in pristine condition for years to come.
Understanding Your Sauna's Needs
Different sauna types have varying maintenance requirements. Traditional saunas with their higher temperatures and steam exposure need more attention than infrared models. However, all saunas share common maintenance principles centered around keeping surfaces clean, dry, and properly ventilated.
- Moisture retention: Leads to mould, mildew, and wood rot
- Body oils and sweat: Can stain and discolour wood over time
- Lack of ventilation: Creates musty odours and accelerates deterioration
- Harsh chemicals: Can damage wood finish and release toxic fumes when heated
Daily Maintenance Habits
The most effective sauna maintenance is preventive. These simple habits after each use take just minutes but prevent most common problems:
After Every Session
- Wipe down benches: Use a clean towel to remove sweat and moisture from seating surfaces
- Leave the door open: Allow air to circulate for 20-30 minutes after your session
- Turn off the heater: If not already automatic, ensure the sauna is powered down
- Remove towels and accessories: Wet items left inside promote mould growth
If you do just one thing after each sauna session, make it this: wipe down the bench where you sat and prop the door open. This 30-second habit prevents 90% of maintenance issues.
Weekly Cleaning Routine
Once a week, spend 10-15 minutes on a more thorough clean. Here's your weekly checklist:
Wood Surfaces
- Mix a solution of warm water with a small amount of mild dish soap (no more than a teaspoon per litre)
- Dampen a soft cloth or sponge (never soaking wet)
- Wipe all wood surfaces including benches, backrests, walls, and floor
- Pay extra attention to areas that contact skin directly
- Wipe again with a clean, damp cloth to remove soap residue
- Dry thoroughly with a clean towel
Glass Doors and Panels
Clean glass doors using a solution of equal parts white vinegar and water. Spray on the glass, wipe with a microfibre cloth, and buff to a streak-free shine. Avoid ammonia-based cleaners as residue can release harmful fumes when heated.
Floor Care
Sweep or vacuum the floor to remove dust and debris. Mop with a well-wrung mop using plain warm water or the mild soap solution. For outdoor saunas, check for any leaves or debris that may have entered.
Monthly Deep Cleaning
Once a month, dedicate 30-45 minutes to a more comprehensive clean:
Stubborn Stains and Discolouration
For sweat stains or discolouration on wood:
- Create a paste using baking soda and water
- Apply to stained areas and let sit for 15-20 minutes
- Gently scrub with a soft brush following the wood grain
- Wipe clean with a damp cloth
- Allow to dry completely
- Never use bleach, ammonia, or harsh chemical cleaners
- Avoid pressure washers on indoor saunas
- Don't use abrasive scrubbing pads that can damage wood
- Never seal sauna wood with varnish or paint (it needs to breathe)
Heater Maintenance
For infrared saunas, gently dust heater panels with a dry microfibre cloth. For traditional saunas with rocks, inspect the stones:
- Look for cracked or crumbling rocks and replace as needed
- Remove rocks annually to clean out debris and mineral deposits
- Rearrange rocks to ensure proper airflow around the heating element
Check Ventilation
Ensure air vents are not blocked by dust or debris. Clean vent covers and check that they open and close properly. Proper ventilation is crucial for both user comfort and preventing moisture buildup.
Seasonal Maintenance
Every 3-6 Months
- Sand problem areas: Light sanding with fine-grit sandpaper (220-grit) can refresh worn or stained wood surfaces
- Inspect hardware: Check door hinges, handles, and bench supports for tightness
- Test temperature accuracy: Use an independent thermometer to verify your sauna's temperature readings
- Check seals: Inspect door seals and gaskets for wear or gaps
Annual Maintenance
- Electrical inspection: Have a licensed electrician inspect wiring, connections, and grounding
- Deep wood treatment: For untreated wood, consider applying a sauna-specific wood oil (never varnish)
- Replace worn components: Backrests, headrests, and other accessories may need replacement
- Exterior check (outdoor saunas): Inspect roof, drainage, and foundation
Special Considerations for Different Sauna Types
Infrared Saunas
These are generally the easiest to maintain. Key points:
- Keep heater panels free of dust for optimal performance
- Don't spray water directly on infrared emitters
- Check control panel and wiring connections annually
Traditional Finnish Saunas
Higher humidity means more vigilance against moisture:
- Allow extra ventilation time after sessions with löyly (steam)
- Check wood more frequently for signs of moisture damage
- Replace sauna rocks every 1-2 years or when they begin to crumble
Outdoor and Barrel Saunas
Weather exposure creates additional maintenance needs:
- Apply exterior wood treatment or stain annually
- Clear debris from roof and drainage areas
- Check for pest intrusion or damage
- Ensure proper ground drainage around the sauna
Troubleshooting Common Issues
- Musty smell: Improve ventilation and do a thorough clean with the baking soda method
- Dark stains on benches: Regular cleaning with mild soap; sand stubborn stains lightly
- Mould spots: Clean with diluted tea tree oil solution, improve ventilation, and address moisture sources
- Sauna not heating properly: Check heater elements, thermostat, and electrical connections (call professional if needed)
- Crackling sounds: Normal for wood expanding and contracting; concerning sounds may indicate loose components
Extending Your Sauna's Lifespan
Beyond regular maintenance, these practices help maximize your sauna's longevity:
- Always sit on a towel to minimise sweat absorption into wood
- Shower before using to reduce oils on your skin
- Don't eat or drink in the sauna (except water)
- Keep pets out of the sauna
- Address any issues promptly before they worsen
With consistent care, your home sauna will provide a clean, relaxing, and safe environment for many years. The effort you invest in maintenance pays dividends in both the quality of your sauna experience and the longevity of your investment.
For more guidance on getting started with your sauna, check out our Beginner's Guide to Home Saunas.
