You mention she is still in quarantine...does that mean you're also keeping her on white paper towels? If not, that's best when watching for mites too.

Anything that was in her cage that is porous (like mulch or wood decor) sadly should be tossed out...mites or their eggs can hide & return quite well if you don't.

Hides used should only be non-porous plastic ones for now, and you might want to offer a water bowl that's plenty big enough for her to soak in, as she may decide
to do that on her own...most snakes with mites do that (soak on their own), to relieve the itchy bites & to help re-hydrate.