What color are the mites? They may possibly be springtails that got in with the substrate.
As for mites they kind of look like poppy seeds and can be embedded between the scales. Definitely look on her chin for them between the scales.
Okay, just fed her so I'll look in a couple of days. They were small and white-ish. What do I need to do to get rid of them if I find them between her scales?