AVID, Kills mites dead. Don't mess around, spray the plants with this stuff before they go to bud and the mites are gone for good. AVID is a systematic miticide, which means it continues to kill for months.

I have heard of a lot of people using Dichlorvoros (the chemical in no pest strips) and it works for some. The key is how much air exchange is happening in the room. If the no pest strip can be in the room and the chemical that it gives off reaches a high enough saturation in the room it will work. My room always exchanged air to fast for the no pest strips to work.

AVID always works though.