I can vouch for the Petco Natural Chemistry reptile spray. Did not work instantaneously or anything magical, but is readily available in-store. Took three applications to rid my guy of them, so about 9-10 days (it says repeat in 3 day intervals, but I think I missed a day on the last shot), and then after a week I sprayed everything down again just to be safe, but didn't notice anything.

It says you can spray it directly on your snake, but...I worried about it, so I went with the other option of spraying it onto a paper towel and letting him "run" through it. I would wipe him down (be careful of eyes, pits, mouth--essentially, don't get it in his face), put him in one of those critter keeper carriers (my guy's a small hatchling, not sure about yours) with some water to let him soak while I cleaned his tank, sprayed the tank down, let it sit for five minutes or so while I vacuumed the area around the cage and wiped his shelf down with the reptile spray, then rinsed it thoroughly and dried the tank REALLY well before sticking him back in. Don't forget the lid in all of this.

Save yourself some money and use paper towels for bedding right now. Don't leave any wood in there like climbing sticks or wooden hides, as I hear mites are virtually impossible to get rid of on wood. I cluttered his tank using an old hand towel that I loosely lay on the bottom of the tank for him to crawl through--he loves hiding in it and moving it around, and it's easy for me to take out and throw into a heavy duty wash load. Water bowl was a couple of tupperware containers I weighed down with a few rocks; could switch them out and use the dishwasher to sanitize them, and boil the rocks (make sure they've cooled before returning to cage). I would use disposable hides for the time being--if he's small enough (and really, if he's a hatchling at least, he will somehow be small enough xD), toilet paper rolls are awesome; also, mine really, really liked a Lipton soup mix box. Guess it was cramped enough to let him touch all sides and feel secure. Anyway, disposable or sanitizable items only right now. Throw away bedding and hides with every cleaning and replace with new ones that haven't been in the area to avoid recontamination. Process is to be repeated every 3 days until no mites are detected, and then I would do it again after another week of no mites just to be extra certain.

I'm no expert, so take my advice with a grain of salt. Just repeating what worked for me.