Do u want be organic or do what to murder them? The 2 spotted mite at 90degrees will produce around 30,000 babies every 3 days. Some types of mites can produce 300,000 very 3 days. So here is the science of spraying. Mites are a 3 stage insect egg, larvae, adult. Most things that kill insects only kill one of those stages. So if you only spray once. Guess what happens eggs hatch and the cycle just starts up again. If u Spray say once a week quests what the cycle just starts again. And with any insect a small number will be immune and the next babies will get harder. SO What does this mean. To break a Cycle of Mites you must spray at least 3 TIMES 3 DAYS APART.
And if you can with a different MOA each time then to be safe 3 times one week apart. If you dont do this you will never control the problem.