OK this little one is about 3 months old and I'm pretty sure it's a male. I defer to the expertise of those wiser than myself and would appreciate a second opinion.
Get rid of the substrate at the bottom. Its a breeding ground for mold. Also is more work to clean than is worth. To keep humidity up use live plants and use a clear shower curtain on a side or two of the enclosure.
The temp is too high. 85 would be a max temp I would have him basking at. Also move the basking spot farther from the light. May want to get him to a vet to be checked out as well. Burns are never good
Is he shedding? When my guy is shedding his appetite is terrible. Also as I understand it as they get older they eat less often. (Going from twice a day eating to every other day eating for example)