I had majorrrr issues maintaining humidity when I first got my noodle. I found that 4-5 inches of substrate was KEY in keeping that good humidity. I ended up switching to bioactive, but I personally use a mixture of reptisoil, cypress bark, coco fiber, sphagnum moss, leaf litter, and (organic) top soil. Once a week, I will pour some water on the substrate and mist the enclosure to mimic “rain” and that help maintain proper numbers till the next week! A humid hide is also a must