We used to burn a lot of incense, before getting snakes, but stopped because we were told that it's not good for them. Though, I have seen no hard data to support this theory. The same thing could be said about cleaners and sprays. :shrugs:
A lot of the things, said in the herp world, I find out later to be untrue. I guess an argument could be made about misinformation, but I don't think I would be willing to use my collection, as a testing ground.
I guess the best thing to do, is errr on the side of caution.
Wayne