I have the same problem , but i only cover 50% of the screen top and use a humid hide, which my guy hates , he won't even explore it. I also use a reptifog fogger on a timer to go off every 4 hours and it works great. Creats a gentle fog so fine that even when it dissapates nothing is wet but the humidity is noticeabley higher, up to 60 - 65%. So for extremely dry places that is another option. I live on long island and we only have humidity problems from november to march . most of the time our humidity is around 50 - 60% with no added help.