Place a wet rag along the top of the screen on your tank or up to the heat dome then get a plastic container cut a hole in it the top and place some sphagnum moss in it,wet it ,ring it out and keep it damp and that will help raise humidity. I'm actually about to up the temp in my tank and going to do the same. Wanna see if I can get my tank to he a steady 90 degrees and atlesst 50 % humidity. Cause now I'm at 86 degrees and 40-50 humidity on avg..that's before misting. I know if I raise temp it can dry out the tank,so have to get humidity up.