I dont know how you may have your tank set up,which would help some,But I am wondering do you have your lid sealed off?If not you need to do so!Some take duck tape an seal it off except for maybe a 2 in strip along the back,but I personally felt that kinda looked shoddy as !Well you understand so I use a incadesent light in a heat lamp sheild to give light during the day hours!So I went to walmart an bought a role of scotch tape, a roll of glad seran wrap,an a couple of pieces of poster board!I set the light over my heat pad an then took the poster board an cut the propper size an length,leaving only enough room for the light fixture,then completely wrapped the poster board with seran wrap,that way the humidity doesnt ruin the poster board its then sealed,I then sealed this to the lid with the scotch tape!Put your boa's water bowl over the heat pad,this will help some with humidity!Personally I still have to mist a few times a day because if I didnt I only get 45% humidity an that isnt food!When a boa is in shed their humidity should be at least 60% or better for good sheds!Misting wont hurt your boa at all but you dont want to go over board with it cause this can cause ri infection also!Hope this helps!Eric[Hypoboa]