I just got rid of mites on a new rescue by soaking in soapy water (she was very small and not healthy at all so I did not want to cause her any more physical stress by using chemicals) I used mild hand soap. The snake was totally isolated and kept in small she tub and that kept in a large tub filled with diatomaceous earth. I cleaned the tub she was in every day and soaked her twice a day for two weeks.

PAM works but there are other options if there is concern about the chemicals.