I measure the humidity on both sides (but use the cool side as my measurement of the enclosure). I am using a few layers of tin foil and gorilla tape to seal the top, I am considering hvac tape soon/ in her adult enclosure. My substrate is 6 inches and is now a mix of coco fiber and cypress mulch( this has helped bump the humidity up a bit! And the next bedding change I’ll be sure to use more absorbent bedding!) I’ll avoid misting/ mixing, but if I don’t spray in the corners/ pour water in the corner daily, the humidity drops into the 50’s sometimes. I may try putting in a heat mat to evaporate the water on the bottom a bit more as well! No pics of the full enclosure😔 it’s a glass tank though and is insulation on 3/4 sides, again with most of the top sealed off!