Please just cut to the chase (if your BP has mites) and buy Provent A Mite. It is readily available online, and is the professional's choice. Anything less merely might kill a few mites, but does not solve the problem.
By the time you can see mites on your snake, it could be a pretty severe infestation. My best advice would be to look into the snake's water dish and check for any dead mites.. you might have to let the dish sit for a few days unchanged. But the switch from cypress to paper will help immensely; once you see mites, you'll know.