Thanks for the input! I do have the majority of the screen lid covered with aluminum foil. I live in Arizona and with the weather getting colder the air has been really dry so even with the cover it has been rather tough to maintain. Part of it is probably the fact that I have had to add a heat lamp to keep ambient temps up since it is getting cold and the UTH alone just isn't cutting it. I would rather mist than keep the house at 80 degrees through the winter, but I think the heat lamp is drying it out. I figured maybe a moister substrate would help at least keep it more stable. The humidity hasn't dropped dangerously low, just due to regular misting, but I do worry that the 10% fluctuation is less than ideal. He is probably due to shed again soon, and although I have managed to get the humidity as high as 65% most of the time it is closer to 55-60% and I am going to want it higher while he is shedding. I am not sure I can get it above that with the current set-up, but thought maybe a different substrate would boost it to the point where misting would really give it that increase I will need.

Out of curiosity, other than pine, is there any kind of substrate that is considered bad? I want to say I have seen some people complain of certain bedding being too sharp. Is there anything that you universally stay away from for health or safety reasons? Also what is the difference between the Eco-Earth, Coconut Husk and Repti-bark? Has anyone had any experience with the Eco-Earth being too sticky and thin and causing problems during feeding or getting stuck in mouths or noses? These are just a couple of issues I have read with that particular one. He is fed in his enclosure and while I understand that ingesting a tiny bit of bedding here and there shouldn't be a problem, I would like to avoid that if possible.