can you give us an idea on what his light setup is.. you want to be using either a mercury vapor bulb which gives of uvb, uva, heat, and light. also you can use a fluorescent tube light with a basking light and also a ceramic heat emitter bulb for nights. what kind of foods are you giving him?, are you giving him vitamins and calcium D3?, how late do you turn off his lights?, how often do you handle him?