That's good to know! I'll be sure to switch to tin foil in that case, because even with the towels double folded it still seems to slowly drop down.
Also, on your last reply, you mentioned putting the water bowl under the lamp. How much water should I be sure to put so it'll last him a good while without fully evaporating?
I know it doesn't evaporate that quickly, but I want to be sure that he has enough water to fulfill his needs when I'm away. He has a pretty wide ceramic water bowl, so it could hold some pretty good amounts