Clean an infrared sauna with the power off, the cabin cool and the method approved for its surfaces. Start with sweat removal and drying. Treat wood, glass, fabric covers and heater surfaces separately: a cleaner that suits one part may damage another.
This is a household ownership checklist for a wooden infrared cabin. Portable fabric saunas, blankets and public facilities need their own product instructions and cleaning procedures. It is not a disinfection protocol or permission to open electrical equipment.
Start with the manual for your exact sauna
Keep the model number, serial number and manual together. Manufacturers change heater coverings and cabin materials, so a cleaning tip for an older unit may not apply to the one you own. The Sunlighten manual library and Clearlight service portal are useful starting points for those brands.
Sunlighten’s cabin care guide directs owners to apply wood cleaner with a cloth rather than spraying the wood, remove moisture after use and leave the door or vent open for drying. Its more detailed procedures include model-specific tasks. Do not transfer them to another brand or heater design.
The Clearlight Sanctuary 5 manual also calls for cooling and disconnecting power before cleaning. It distinguishes damp-cloth cleaning from dry care of flocked heater surfaces. This difference is why treating every surface with one spray bottle is a poor approach.
What to put in a basic cleaning kit
- Clean soft cloths reserved for the sauna.
- Fresh washable towels that fit the approved seating arrangement.
- The manufacturer’s approved wood and glass products, if needed.
- A small container for any dilution the product instructions require.
- The manual and a simple maintenance log.
Label bottles clearly and retain the original product instructions. A homemade mixture with an uncertain concentration makes it harder to diagnose a stain or residue later. “Natural” on a label does not establish compatibility with your wood, glue, fabric or heater coating.
A practical routine after a session
- Finish and shut down. Follow the normal shutdown and power-isolation instructions. Allow the equipment to cool before cleaning.
- Remove damp textiles. Take used towels out for washing instead of leaving them folded on the bench.
- Check the contact areas. Look at the bench, backrest and floor for sweat or spills. Use the manual-approved method to remove moisture.
- Let the cabin dry. Use the door and vent arrangement specified by the manufacturer, while keeping the surrounding room secure and accessible.
- Leave it ready. Once dry, inspect the seating area before putting clean items back.
This short routine is easier to maintain if clean towels and a cloth have a designated storage place outside the cabin. Avoid using the sauna as a storage cupboard between sessions: extra objects make it easier to overlook moisture, obstruct heaters or forget something before the next warm-up.
Wood, glass and heaters need different care
| Surface or issue | What to check first | Common mistake to avoid |
|---|---|---|
| Bench and backrest | Wood type, finish and approved cleaner | Soaking the wood or using an unapproved finish |
| Door glass | Glass-cleaner instructions and nearby wood edges | Letting runoff reach wood, controls or seals |
| Heater face or fabric covering | Whether only dry surface cleaning is allowed | Scrubbing or wetting a delicate heater covering |
| Floor and ventilation openings | Access and cleaning instructions | Blocking openings with thick mats or stored items |
| Controls and wiring | Owner-accessible tasks versus service work | Opening energized electrical equipment |
Work on a small inconspicuous area when the approved cleaner’s instructions call for a compatibility test. More product or more pressure does not necessarily clean better. Photograph an unfamiliar mark before attempting treatment so you can show support its original appearance.
How often should you clean it?
Use the manufacturer’s schedule as the baseline, then account for how the sauna is actually used. A cabin shared every day accumulates more handling and moisture than one used occasionally by one person. Cleaning after each session does not replace periodic inspection.
Use a calendar reminder for the manual’s deeper maintenance tasks. Record the date, what you cleaned and any change you noticed. Include door alignment, loose seating components and visible surface damage in the observations you send to support; do not attempt structural or electrical repair simply because you noticed it during cleaning.
Stains, odors and suspected mold
A dark mark is not enough to identify its cause. Note whether it is dry or damp, whether it returns after cleaning, and whether moisture is also present in the surrounding room. Repeated condensation or a leak calls for finding the moisture source, not just disguising the mark.
If there is suspected mold, persistent mustiness or unexplained wet material, stop using the cabin and ask the manufacturer or a qualified remediation professional to assess it. Heating the sauna is not a substitute for identifying and addressing contamination. Avoid sanding an unidentified patch or spreading it with a household fan.
For an ordinary cosmetic sweat stain, obtain written instructions for that wood and finish before using abrasives. Keep photos and correspondence. A surface treatment can affect appearance and warranty questions even when the cabin still functions.
What not to add during cleaning
Do not improvise with a steam cleaner, hose, pressure washer, strong solvent or interior furniture polish. Do not put fragrance or cleaner onto a heater to make the cabin smell better. Only use substances and application methods explicitly permitted for the exact component.
Never mix cleaning products. If you accidentally apply an incompatible product, leave the equipment off and ask support how to remove the residue safely before reheating. Ventilation alone does not establish that an unknown residue is safe.
Cleaning questions owners ask
Can I use vinegar?
Only if your model’s care instructions permit it, at the stated dilution and on the specified surface. Some manufacturer guides permit a particular vinegar mixture for wood; that does not make it a universal sauna cleaner.
Does the heat sanitize the sauna?
Do not rely on a session temperature or a long empty run as proof of sanitation. Clean according to the product instructions; shared commercial use needs an appropriate hygiene procedure for the facility.
Can I cover the entire floor with towels?
Check the manual. A towel placed for comfort must not obstruct floor heaters or ventilation openings. Approved coverage can be model-specific.
What should I check before buying a used sauna?
Request clear photos of the floor, underside of the bench and any stained areas, plus the serial label and service history. Confirm recall status and repair documentation with the manufacturer before operating it. Cleaning cannot fix damaged wiring or a recalled component.
For material selection, see sauna wood types. For placement and service access, use the indoor sauna installation guide.