it isnt bad maintaining the proper environment. I put plastic wrap on the tope of the lid (there ARE vent holes, no worries) and that totally solved it. its even a little foggy in his tank now (on the glass sides) which is good because he is nearing his shed cycle. I love my bp waay too much not to have him with me for a year. And everyone in my family thinks he is weird and will not feed him :(