Hotsalza,

Luckily I haven't had to deal with mites, but I have never heard of PAM not working when used properly. So I'm wondering why you had an issue with it? Strange! did you treat all of your snakes and all of your enclosures? If not, that is probably why they kept returning.

Also I have heard that wood enclosures, as well as carpet make mite treatment a freaking nightmare!