I have to add, because I see it a lot on here: You have to take into account your house humidity. Nobody seems to account for that. I say this because my apartment in the winter is as dry as a desert and it doesn't matter what kind of enclosure you have humidity is an issue. I run a humidifier that does very little, I'm constantly refilling this thing but the humidity never goes up. I constantly mist the enclosures. And I've had glass and did all the tricks. I have one in a tub that gets dry as a bone because I have to have a heat lamp on it because the flexwatt alone does very little to create a warm spot (why does everyone praise these things) when the ambient is 70 F. The other one is in a T-8 with an RHP and I have to mist that thing daily as well. Fact is, you will have to be proactive if your environmental humidity is low. There is no one trick to solve the problem. Tricks will help if your environment is maintained at 40-50% but here in the plains the indoor humidity is 30% at best.