My ball just got over a yeast infection due to the humidity being too high. The vet had me soak him in some solution for a week. So that I don't have to spray the tank and soak the bottom, I bought a snake cave with moss so I can give him a humidity box.

My question is, should this go on the warm side or the cool side? Also, is it too soon to put one in after he just got over an illness from humidity being too high?