Provent-a-Mite seems to be the best out there. It doesn't hurt to use it anyways. I dose the cage of every new snake I get for precautionary reasons any ways. I used to use Kitten flea powder under the newspaper for awhile, but it just made a powdery mess out of everything. Thus, I took some good advice from this site's great members and bought some ProventAMite. It works great and is a one treatment way of getting rid of mites and the eggs; the eggs are the pain of the whole ordeal. Mites are easy to kill, but the eggs are not. They can keep reappearing for months! PITA!!!

Did you say you have a digital thermometer/hygrometer or an analogue? If the temps and humidity levels aren't right it will stress the snake out and make it soak a lot too.