Ok, so, I've now had my cham at the vet for this issue twice. Two separate vets, He's been on 3 different medications. Here's his living parameters:
Basking temp: 97-102
12 hours on, 12 off. UVB 10.0 tube bulb (not coil)
mistking every other waking hour between 1-3 minutes. In between in summer...