That poor thing
Could we see a picture of your set up?
Also, what are your temperatures at?
Bp's need a cool side of 79-81ish and a hot side of 89-91ish. Ambient is fine at 80.
Do you have a regulated heat source?
If you're using a tank, wetting a towel and covering the majority of the lid will work to help keep humidity up. If your humidity is as high as you think, the glass on the aquarium would be fogging up. If humidity is just high in your area, try an oscillating fan.
Could we see pictures of him?
The wheezing could mean he's gotten an ri. If he sounds as bad as you say, a vet visit would most likely be in order.