Soak him/her in lukewarm water (check the temp! warm to you or I, at 98.6, is waaaaaay too hot for a snake) for 15 minutes or so and then check the water after you take the snake out. The water will drown any mites that are present on the snake and then you can go about treating your tubs/tanks if you do have a mite problem. They're pretty small and hard to see, but they should show up in the water if you look closely enough and they're on your snake in the first place. Fingers crossed you don't have them but hope that helps... Good luck.