If you absolutely have to use the ceramic heat emitter, try getting a large surface area water bowl near the basking area of the CHE. This will kick more humidity into the air. Also, like a previous response said, cover up that top to keep humidity in. Pre-shed: mist if need be and definitely lay off the handling when they are shedding. Imagine if you couldn't see AND were preparing to slough off all your skin...I imagine it would be pretty stressful.

For the humidity it would be best to bring ambient temps up in the room so the CHE is not needed. Mind you, I say this as I sit here and sweat. But gotta keep the herps happy!

-JonV