An interesting snippet from today's stream (I caught the replay, I woke up too late to participate): Onni is not filthy, he has apparently been availing himself of random people's saunas while he's on this quest.
I suppose he gets the sauna spirits on side to help keep himself hidden while he clears the cobwebs and other detritus, cuts the wood (lots of it because it will be green), starts the fire, waits for the sauna to heat up, hauls the water in a presumably handy bucket... I confirm that sauna is vitally important for body and soul, but it's a heckuva lotta work for a couple of hours' worth of sauna, just sayin'.