fuck mites. they are such a pain in the ass! Right when you think you have them under control you see a new leaf with the dreaded white spots... I'm gonna try this method colo. Thanks for sharing.
Ha - I like your friend lurking in the avatar pic. One tip though is pets in the grow can bring in mites. Another one I want to try is hydrogen peroxide and a little Neem oil. I might add a tiny tiny bit of Dawn or dish soap to get it to really foam.
Supposedly lemon Dawn is best. I am not sure if it has lemon in it. I have a blue Dawn and also green. Just not anti bctyerial dish soap. The dish soap, alcohol and hydrogen peroxide worked for me. Hat tip to a Canadian poster here who shared that link for soap,peroxide and alcohol. 70 to 90/91% alcohol even if diluted will dry those bugs out.
I also like to water with SNS 209 which has rosemary oil. After about 5 waterings/5 days it is in the plant and the mites bite down and hate it. They starve or leave. It is about $22 bucks but it makes 60 gallons.
Make sure to spray under the leaves well and then drench the plants with high power lights off.. After you drench them - your plants may look like a drowned rat. Don't worry.
I usually let it six for 7 hours then rinse with water and give them time before lights come back on. The mixture is so cheap that doing it every 3 or 4 days is a bargain. I nuked em in the first spray