Right now I am maintaining humidity in mine well. Screen top covered in foil, except space for the CHE. Tank is inaulated on 3 sides with Reflectix. I have to get my UTH going because ambient on the warm side is 77-79. Hot side is 90. Humidity is staying 55-65%. I recently decided to give a towel for substrate a try, and there is a washcloth on his hide on the hot side that I change out every day that I soak with warm water and gently squeeze out.

My house is 68° with humidity at 45-55%.

More than one person here said to not do it because of smell, but I haven't had an issue. It's easy to change the towel each week. There has been no smell, and no issue with Malfoy's scales.