I knew a girl, who was having problems with mites in flowering. She was able to keep them under control til she harvested by spraying the leaves down with cold water. Try it, just avoid spraying the nugs.
Also, another members son suggested something that sounds like it'd help: Get some bamboo poles, taller than the plants. Tie the plants to the poles, and set the fans to high. The constant air movement will make the mites go to the bamboo pole, where it's more sturdy. Wipe the pole down daily with alcohol to kill em, they tend to congregate near the top. It'd be better to try rather than spraying poison on your nugs.