Would ditch the H2O2 and foliar, and see what happens. Plants have evolved to feed themselves thru their roots. So to me, it's likely the best way to feed 'em. Since they are getting their nutes thru the roots, no real need for foliar, especially if the plant is already stressed. Do you rinse the leaves after foliar to reduce build-up and (chemical) leaf burn?

Can you find Superthrive, or some other form of micro-nutes? If so, would ditch the

Some folks do a foliar-only regimin, but those folks generally have their shit dialed-in, have a broader knowlege of the products they are working with, and know what their ladies like. (they know the why-for's and how-to's)

My ladies tell me they prefer the lower humidity in flower. I live in the desert where obviously it gets very hot and very dry. In my outdoor flower room the summer humidity inside ranges from below 15% (before watering) to 40%. (after watering or flushing) I use no humidifier, and I rarely foliar unless it's necessary to correct a defeciency. Especially with the heat, and possible heat burn or mold issues excessive humidity can cause.

Also, do you check your ties often, to make sure none of the twist-ties or string is cutting into the branches?