Cat, I think you are making yourself nervous. Soaking can be a sign of mites but soaking can also mean they are going to shed, building, gravid, etc. I love to see my females soak this time of year. I see a set of signs that let me know my girls are going...eat strong, stop eating, soak and/or sit on the cold side, ovulation....

If you're real nervous take a damp white paper towel and wipe the snake(s) down. If you have mites you should see them on the towel.