I had this I tried everything but nOthing worked till I got this stuff from out of state called fly-x. They definitely suck. I'd say to Remove the lower leaves, remove any leaf that has any evidence of mites. Sanitize EVERYTHING. Wash your plant with dawn, bomb the room. And you might be ok. Ever since my mite issue, I am very strict with my grow area. Nobody goes into my grow room unless at the bare minimum they take their shoes off. And inspect daily.Sounds crazy but I have them at bay. Get a microscope.