I know that it is strongly recommended NOT to burn scented candles nor use glad plug in air fresheners directly around birds. I would assume that the same is true for reptiles being as they also have a fairly delicate respiratory system. How that interprets over to burning incense, I don't know, but while I love incense and scented candles, I shy away from them. My wife does burn them (candles) in the living room, and I have seen no ill affects in my snakes two rooms over. :shrugs:
D80