Hmmm, if she's not showing any signs of illness I'm not sure I'd be that concerned, they are huffy by nature but without hearing what's going on it's really hard to say. Stuck shed in a nostril? I'm assuming all these vets have looked in her mouth, have they done any cultures? That would be your best bet if you think something is going on. I would recommend you change or revamp your setup and get your humidity at a good level 60% or so constantly. If she's having bad sheds and your humidity is up and down with misting, it's not steady or at a healthy level for her and that's of high importance. A tub with a heat mat or PVC cage with a heat panel would be a much better choice than fighting with glass tanks and heat lamps.