i recently moved about a year ago and got mites really really bad, which enentually turned into a infestation, then progressed to where i had fungus gnats, then thrips!!
seriously worst 4 months of my life to this date!
whoever lived here before was a dirtball straight up!
anyways, i tried so many chemicals,
avid, floromite, neemix,
azamax, mallet 20, etc.. i tried them all and nothing worked how i needed it to, i needed them to actually start going away.
in the end the combo that worked for me was mega wash every 7 days, and OG bio wars Foilar pack every 7 days making it where i sprayed every few days.
i also used nemotobes i ordered online for the fungus gnats, which was a root drench.
when things get stressed or air flow gets low, i see the mites pop back up, so i know i still have them, but i regularly sspray the "Foilar Pack" now as part of my regimen.
i honestly thing that the best way to get rid of pest and problems is to make your plants strongers by force feeding them microbes that help u fix your problems.
Foilar pack has proven to be a staple in my garden along with Root pack. my plants immune system is so strong now with all that microbial activity goin on.
Mega Wash + Foilar Pack + Persistence
hope this helps