I read about the strips too... very poisonous. Would not recommend it.
Ive been fighting the Borg for about 3 months now. I tried azamax, sm90, and spinosad with limited success. Knock on wood, I haven't seen a mite in over a week. I don't know if it was my persistence or the fact that it got cold the last 2 weeks. When my furnace is constantly cranking out dry heat, the humidity drops in my tents to 20-30%. I don't think they liked it.
Ive heard of people wrapping a blanket around their pot to keep the roots warm and putting the plant outside in the cold for several hours to kill the mites. It's a long shot at best. I've also heard that capsaicin mixed with water works really well. I never tried it, just trying to give you some ideas.
Good luck with them.
Dont get assimilated!