Whoa, bad ju-ju . . . I feel for ya. I could speculate, but you need someone who's been thru something similar. I use a product called "Eight" for mites, but I dunno about using it this late into the grow. It's totally safe for humans (once it dries) but could mess with the flavor perhaps, and it doesn't sound like you need anymore moisture around anyway.
It's been raining (and cool) here in the Rockies since the day I planted my vegetable garden . . . May 31st!
I thought I might get away w/not having to plant green beans 2-3 times this year, but noooo!

I'll be rootin' for a solution. Not sure if DE (diatomacious earth) stops mites, but it might be worth a look? Seek the "food grade" not the industrial "filter" grade if you do.

Oh, and I don't believe the kind of mold you're dealing with can live w/o moisture, so drying is part of the cure.

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. . . Oh, Danny Boy, the pipes, the pipes, are ca-aw-ling . . .