Mites lay eggs and the Permethrin does not kill them all.
You need to treat for 3 weeks absolute min.
Remember that permethrin (the stuff that kills mites, live and flees) is a carcinogenic poison so if you treat her cage >> take the water bowl out for min 30 minutes (safer, 90 minutes)
Mites can't swim so you can have someone keep her in the bath tub while you clean and treat the cage. (Drown those little red b*stards!!)
If you use a Nix bath (permethrin solution for head lice). Put her in clean water first so she drinks her fill before you put her in the Nix. I know a couple of guys that Nix 100% of incoming animals before quarantine. Works like a charm but you need to take care!
Take as much as possable out of the enclosure until she is mite free for 5 weeks. No wood, no Aspen... Just newspaper, plastic hides and a bowl.
Understanding Mites, and thier life cycle:
Reptile Mites - Karingal Vet Hospital
Have a read here:
http://www.ssnakess.com/forums/gener...d-mites-2.html
(Make sure you let the newspaper dry before you put the water dish in with it)
It will be ok, you just need to work on it for a few weeks.
Hope that helps,
Chris