First off I'm wondering why it has a heating pad and a house? The house should be on the heating pad a another house on the other side in the cool area.
Pictures of your enclosure would be helpful so we can help.
When you think he is going into shed all you need to do is mist or up the humidity some how to 70%+. I up mine to around 90%.
And about the biting, if he hasn't bitten you yet being as scared as he is, he's prob not going to.