Did you read w
Did you read what I said? I said it was well ventilated he's doing fine right now. I've seen many keepers keep theirs in glass and the chameleons live very long and are very healthy. It's more of the care takers job than the cages job.
Chameleons mouth gape when they are too hot. They use that for the saliva in their mouth to evaporate to cool them down. Try moving the heat lamp further away from him/her or the cage.