you can do now is keep temps low....that will slow them down....use a shop vac when you see them....do not spray....just keep temps low for a weeks and get to harvest....cut at the base....hang them and those mite will crawl right to the top and right off the plant.

now once you are harvested.....do not reuse your soil.....clean everything with bleach & water solution.....now once you start up again....use preventive measures....on at least a weekly basis....make it part of growing.....I know....I know....it hard....you dont see them anymore...so you think...hey I got them.....but whats happens....they are there....just waiting to come out.....mostly you will get them from clones....I now never.....ever....get clones from anyone...that I can not take the cuttings myself....I want to see that mother.....Seeds are better....take longer...but you cut your chances from getting mites.

good luck.