Hit that shit with E20 bro! PM is systemic so you gotta soak that soil/rockwool/coco to really kill it, otherwise it's just another band-aid. I hit my mothers and clones with it a couple times over a year ago and I haven't seen a single spore of PM since. The best thing to do is to treat your mothers with a foliar and soil drench and then take clones off of those...safest way to use the stuff imo. As soon as I get new cuts from someone I spray 'em and root drench 'em with E20 before they go into my room. Turn all your fans off, suit the fuck up, gloves, goggles, respirator (rated for pesticide use), booties, full suit with a hood that's rated for pesticide use, spray and drench and never deal with shitty PM again.