The only thing I would add to JeffJ's post is to clarify that provent-a-mite is probably THE best product for treating snake mites.

Most of the products that are marketed for treating snake mites will kill the live mites, but do nothing about the eggs, so the mites will come back. Provent-a-mite leaves an active residue, that kills the new mites as soon as they hatch, so usually one treatment gets rid of the mites entirely.

Some other products may be just as effective, but have not been tested for use on reptiles.