Yep she kept her food down. There were one or two dead mites on the paper towel before I changed it & a few dead ones in the water after her soak. She's struggled a bit with the soaks but calms down after a minute & just sits in the water.
The natural chemistry bottle said it could be used both on the snake & in the enclosure, but it said to wait at least three days between applying it to the snake (exact quote is "Reapply as often as necessary, but not more often than at 3-day intervals). I put it on her yesterday so I guess I'll wait to reapply on Sunday?
I'll keep soaking her daily, then, as it's definitely killing some of the mites & it gives me time to clean her enclosure.