mites like hot, dry, still conditions. they breed something like 100-1000 times faster in those conditions versus cool, damp, windy conditions.
i spray in a 3-5-7 day cycle with einstein oil (high quality neem oil) if i see mites. i also spray for mites even when i don't see any at certain milestones: right before cloning, at transplant, before going into flower.
it's all about containment rather than eradication. you will never get rid of them completely.