Well, I see burnt tips on the leaves, you may be overdoing it there, my brother.
As far as drying it out, yes it could have a caustic effect, technically, and will at least suffer out the microbial life you want. I guess you're using recharge so you're ramping the soil life back up anyways.
I think you need to back off the teas and flush instead. You may be stacking too many inputs now, can lead to a bigger cascade of problems. I thought the 2.5 lbs of KS sounded like plenty of fuel for fire buds, man, and sativas/hazes are not likely to want heavy N in flower anyway. I think you have a lock out from too many inputs.