I wasn't sure if this is a normal issue to have, but I've been having a problem when it comes to the heating for my plastic bin. My setup, heating and lighting wise, is a 40 watt heating lamp (but I haven't installed like a little wire mesh thing for it) and a National Geographic Under Tank Heater who's only settings are on and off and it gets pretty hot pretty fast. The problem is, I have to monitor it at least every three hours to make sure its not too hot or too cold. Is that normal? I'm trying different solutions, like having a fan blow in my room, turning off or pulling away the UTH, and putting a towel over the heater (which seems to be working the best). Is there anything else I can do?