West coast og twins

So got home from my trip and discovered powdery mildew. Treated with neem and installed charcoal filter to get cleaner air into the tent. I also stripped leaves off clones that had it really bad. Any suggestions on how to treat powdery mildew? Both west coast ohs look to have 2-3 weeks left. Plants are smaller but bud looks really nice. Blueberry is starting to bulk, but moving slowly, and northern lights is just busting into flower.