Mighty Wash is a contact killer so you may miss a tiny section here and there. And it will not wipe a bad infection in one spray, eggs hatch etc. But it will wipe them out with a little diligence.
Every person I know who has used it is very satisfied.
The exact same thing I can do with spraying insecticidal soap (potassium soap), better even insecticidal soap with some Neem oil. For...like 1000th of the cost.
"Frequency Water" my a$$.
1) Get insecticidal soap (potassium soap).
2) Mix 1.5-2% of the soap w/ BOTTLED water and stir, make an emulsion. Bottled because bottled water is usually not as hard as tap-water, it "sticks" better to leaves. Plus, bottled water dissolves soap better, very hard tap water might flake soap so it doesn't lather right and not form an emulsion.
3) Add 1%-1.5% Neem oil
4) ph down the entire thing to 5-6ish (this is recommended although I don't think it's necessary). Otherwise the soapy water will have a very high ph, like 8+
5) Shake/Stir
6) Spray liberally at low light/night. No need to rinse.
100% natural, kills on contact AND preventive, the potassium soap is actually beneficial for the plants since it turns into potash --> fertilizer.
You see, if I were a shady scammer I would produce this for pennies...slap "WORKS BY ESOTERIC MAGIC!!" on the label and then earn myself silly selling it to stoners as the best solution for mites and other bugs for €35 a gallon.