I'm just throwing this out there as an alternative to chemicals. I have a friend who swears by this method because it gets rid of every stage of mites, including the eggs. I am currently trying it for the first time and so far, I would say it is working. It appears that there are no more mites left on or around the 2 snakes that I treated last week, but time will tell if they are completely eradicated. Here is the link:

http://www.biconet.com/biocontrol/hypoaspis.html