Despite the minor annoyances of the above, I've also noticed one positive surprise, too: Not a single spider or insect has ever been found in the sauna! Even during times when it hasn't been put to use for a while, none of the numerous spiders around here have left evidence of exploring the sauna. Not one. I'm guessing there's something about the hemlock that's keeping them out. Whatever it is, it's good news for me.