Pro-vent A Mite is the BEST! My fiancee and I were cursed with a mite infestation which affected 10 of our snakes. After two months of soaking, veggie oil rubs, and pet store treatment, I was reaching my breaking point. I was picking them out of my red-tail's scales with tweezers nightly. We ordered provent a mite and after a hard breakdown of all our racks and such, we treated and now do a very minor spot protection once a month. It's like nuclear weaponry. The mites are LONG gone.
Below is the best video I found on mite pro-vention (heehee...) and this is the method I use now. Works like a champ.
http://www.youtube.com/watch?v=RdBlrRTEEeM