Oh, I have nothing but good to say about Dr Zymes. You must have applied it to extreme excess. You can rinse it off, if necessary, too.
It’s really just citric acid, potassium bicarbonate, and sopanins. I have even made my own using my organic pH adjusters and yucca. It works by messing with the leaves’ surface pH. Microbes can’t attach, insects don’t want to munch.