Just trying to come up with different possibilities. Granted, if a particular snake came into the collection already sick, it is more likely that some bug is spreading...but if cultures are coming back negative and standard treatments aren't working...it never hurts to look at alternative possibilities. I don't imagine candles and such would bother reptiles, as a general rule...but there are some strong stuff out there that people use to "freshen" their homes and I just wondered if such a list might jog a memory of something new coming into the home right about the same time the first sick snake did.