@ M A- I'm glad you jumped in on this (I didn't know they travel upwards, etc) & I agree that we all have to make our own decisions, what we're comfortable using, which is why I linked bcr229's write-up early on, which covers the options pretty well. And for any new snake-keepers it may confuse, "PAM" as referenced for fighting snake mites is NOT the cooking spray- the letters P-A-M stands for "Provent-A-Mite", as praised in the previous post. I've no doubt it's effective, as it's one of the stronger options. No matter what you use, following directions closely is so important.