Most effective treatment for powdery mildew?

I've read about a couple treatments such as milk and high ph water sprays, but none of that actually seems to be helping, and im getting real tired of spraying individual leaves for over a fucking hour almost every day. What will knock this shit out so I can spend more time with my family and less time with my plants after work?

Probably leaning towards SM90 because i'll have to spray pretty close to the buds, anyone have experience with knocking out WPM?