i do have an overhead red heat light on top of the tank. it seems to keep the gradient just perfect. i also have 2 water bowls inthere already. he hadn't started soaking all of the time until he went blue. i figured it's just because of the lack of humidity for the shed. i have a damp towel on top of the cage right now, but it just doesn't seem to be doing the trick. i will do the saran wrap thing tonite and see what happens. i checked his underside this morinng when i changed his water...it still looks really healthy. i also checked the water for mites again last night...put a bit of the water under the microscope. didn't see any mites. as far as ventilation, my tank has 2 screened holes in the sides. that should do the trick, right? i sure appreciate your help.