I would avoid the pesticides at this stage - and trust me, I have no problem using them during early to mid flowering. I agree with the alcohol and cotton swab just to keep them in check until you harvest.
Then...consider water curing them. A guy on here had the exact same problem and did the water cure. He said that method washed off a bunch of mites, eggs and crap that he wouldn't have seen otherwise.
MMMMM....a big toke of mite crap!
Good Luck
YO