Hey there...I had this problem last year. The best way to get rid of the powdery mildew would be to use a fungicide, but when we r smoking and eating this, it can be hazardous to us.
I used a combination of 2 tsp. cider vinegar with 1 litre of water, which worked quite well. I also tried a mixture of 60% milk and 40% water which also worked quite well, but I did noticed a faint sour milk smell a few days later, which did go away over time.
Take away all the mildew u see with the blind eye then spray with whichever u chose. Good luck!
Hey im the guy that posted bout using urine and i tried it for the first time yesterday and its 9hrs later and most of my bbys are looking pepped up. Your post was very helpful, when you spray your gals do you use the same water/urine ratio as when you feed?
Again thanks for the info...