I use Provent-a-Mite(PAM) to treat for mites.
The mites disappeared the day after I used it.
Before PAM, I gave my snake daily baths with a drop of dawn soap until I could treat it properly. The soaks minimized the mites.
Also, sanitize all water bowls and other enclosure accessories with hot water and bleach. Change all substrate to paper towels until the mites go away. It will be easier to spot mites.
Good luck