Bud.tpr said:

I think the alcohol kill my plants the leaves turning. And the whitebuds turning brown

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Neem oil can do that, not alcohol. I don't recommend using neem oil. Alcohol and hydrogen peroxide solutions are effective, but I prefer AgroMagen GrowSafe. I've had excellent results with it.

An important part of spraying for mites is to be able to spray upwards to wet the bottoms of the leaves. I bought a sprayer with a nozzle that can be adjusted. That made spraying a lot easier.