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The sweat does vaporize, but I still think keeping it hot helps to clean it maybe? I also like the smell of a hot sauna. The main reason I don't do that and I run the dehumidifier is that I like to flip the power off to the sauna at the panel when I am done, just in case. The dehumidifier is heavy duty fwiw.

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Sounds good then! I'd try running it hot after use -trick to see if it makes any difference. You could probably get good 50 years of use out of it if you treat the wooden parts inside with oil such as [1]. The sauna should be extremely dry before treating it and you can do that by running it couple of hours hot without using. The oil needs to be non toxic and non water soluble so high temperatures won't vaporize any toxins from it to your breathing air. It deepens the color of the wood a bit but should look even better.

[1] https://www.amazon.com/Liberon-003815-Finishing-Oil-Liter/dp...

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