Treat for mites for at least 60 days if not 90. They can be extremely persistent little buggers, and you don't want all of your hard work to be for naught.

Remember to thoroughly vacuum & wipe down the entire room that your snake w/mites is in, as this will help reduce the possibility of wandering mites laying eggs on available surfaces. If you have access to a steam cleaner, that makes a great treatment for nooks & crannies, as mites & mite eggs can't handle hot (105+ degrees) temps.

Good luck & hang in there!

K~