Wash everything in soap and water. I am not sure where you live, but air dry it if you can. Replace bedding, or use paper towels. Before putting them in, spray the container the snake is in. spray anything that is going in there with the snake. Let that dry for 15 minutes.

There's a spray that is often sold along with PAM (Natural something or other, I forget the name).... if you have that, spray the snake, and be sure to let the snake soak. It works by dehydrating the mites, so you don't want to dehydrate the snake as well.