I've treated all my tubs with PAM when I first saw a mite - and then treated the tubs and rack monthly as a preventative - but right after I brought another rat it for feeding - I see mites again.

I am convinced that the rats are bringing them in. I never get infested or anything - just maybe 2 or 3 mites in one tub - other tubs are not even affected.

Very frustrating to say the least.

I may try that idea about treating the rat cage bedding with PAM before I offer the rat to my snake - thanks for that tip.