First off, the moss is great. But you still need more plants and branches in there.
Also, it takes hardly any heat at all for the lamp to dry out the enclosure. The light combined with even a tiny amount of heat, plus the open area where the lamp sits, will SUCK humidity out of there almost faster than you can spay it. You are seeing that result first hand. If the humidity is falling so much that you're going from 80-90% down to 30% in 2 hours, then it's the lamp!! Take the lamp out and mostly cover the screen top, stick some live plants in there, and you will see almost instant results.
We never said you were a novice - I didn't get that impression.The light is a 20 watt on a dimmer all the way turned down.. I really doubt that's drying his tank out. It puts out 0 heat. I'm not a novice as I have other reptiles just none that require a constant humidity.But cresties do NOT require constant humidiy. They really do need that drying out period. I am only answering the questions that you ask....
We aren't trying to be critical - we are just trying to help you have the best experience with your little guy that you can possibly have. Cresties are super easy to care for, but the babies can be delicate. We want you to have great success with your little one.![]()