Is this your daytime humidity? What are your nighttime humidity levels? You state that you see your cham drinking all the time, are you sure you are getting your levels up high enough? Your nighttime levels should be anywhere between 80-100%.
It is
Waxworms are not really recommended as a staple item and should be fed only a couple times a month max. How many food items do you feed your cham and how often?
I feed 1-2 every two weeks
Be more specific here. What brands are you using e.g Repashy calcium plus lod, arcadia earthpro A. And how often?
Zoo med I think
I'd try to handle him less if you can, especially if he is seeking a dark corner and sleeping. This could be stress induced. Is his cage by a window where he can see something outside? Do you have a cat?
no other animals, no window
Sorry to disappoint you with my presence--I am not
@ERKleRose 
Everything else seems good. I'm sure
@ERKleRose might come along and pick up on something that I missed. My eyes aren't as good as they used to be...
no problem
The more info you provide us, even if you think it isn't important, the better we can help. Also, send pictures of the setup.