I know this has been asked over and over again so I apologize in advance. I'm really having a hard time with humidity for my snake, it's more of a "dead heat" in his cage. I'm using a 20 gallon glass tank. The humidity keeps dropping to 15%. I put a humidity hide in there for him but he never goes in it, he only stays on the cool side. I mist a couple of times a day as well.

I tried using plastic wrap on the top as well as a wet towel, only covering small section so the air still gets in. I have a screen top, I think that may be part of the problem. His skin looks a little dry.

Any other suggestions?

Thank you