I agree with redshepherd, I have to wonder how many snakes your "exotic vet" has actually kept? (did you ask?) Unfortunately vets are like everyone else,
they have their favorite animals as pets & while they mean well & want to treat the others, they often haven't kept them & only "know" the husbandry from
old out-dated sources. What they focus on in their training is the medical treatments (surgery, meds & procedures). When you take a snake to the vet, be
prepared to talk about what you have observed & what you suspect is an issue- snakes (& other pets) often don't present many clues & to get the best care,
you should be ready to speak for your snake. In a large cage, it probably wouldn't hurt to put in a large water bowl -it helps the humidity if nothing else.
(I've heard some strange things from vets too, over the years...)