What's the best things to do to 1) prevent mites 2) eradicate mites ?

I have had my milk snake for almost a year and have never had a mite. I do however hear horror stories all the time about them. I bought a product off the shelf at a reptile section in a pet store called Jurassi Mite as a deterrent if I ever got mites. Is this a good product? Or can you suggest a better product that I should have on hand? Where do mites come from if you only have one snake.