I noticed some webs on my moms a few weeks ago....couldn't identify the culprit(s) but my basement has an assload of spiders and have even seen spiders (like wolf spiders) on my plants....
I hate spiders but I know they eat other bugs so I leave them be unless they get too bold and decide to check me out.
Anyway, I bought a spray bottle and some neem oil. I filled the bottle with water and poured about a shot glass worth of oil in it, added a small drop of dish soap and shook the hell out of it. It looked like dirty milk.
I saturated the hell out of my moms, over and under, up and down, sideways and back again.
Have not seen a single indication of any life on them since....lost a few leaves but nothing even close to concerning.
Again, I do not know if it was "mites" or just my spider tenants but either way it seemed to kill or scare off whatever it was.