http://vpi.com/publications/the_life...of_snake_mites
Snake mites do not come from your bedding they appear when an animal is not properly quarantine and transfers mites to other animal's in your collection.
So to have mites you must be in contact with an animal that has mites, that why you quarantine, don't take your snake out at a show or a pet store, be selective if you buy live feeders and why when you go to a show or a pet store you shower and change cloth before going to your snake room (mites can hitchhike on you or a feeder animal if feeding live)