Powdery mildew 7th week flowering!!!

Hello, I wanna hear some suggestions on my problem...please. 7th week of flowerng, bought as clones from local dispensary, some trichomes clear, some cloudy(60clear-40cloudy). Have been struggling with PM since 2nd week flowering and keeping at bay w/ Mildew Cure organic spray. What do you think about harvesting now? The PM is starting to become tough to keep up with and starting to move onto the bud leaves. Just used Mildew Cure today and will probably only work for a couple days if I even got it all! Any suggestions would be greatly appreciated. ALSO...would a sulfer burner solve my problems next time?


2 WW, 2SD, 1 Ambrosia, 1 Hawaiin. 600w HPS- 4ft 6 bulb T5's - 5x4x8 closet- 240cfm intake& exhaust- fan blowing on light, fan circulating air- Temps started perfect but last week temps getting to 92 daytime and 78 night- humidity 40-50%

You need to have air moving 7/25 across the bottoms of the plants, a light beeaze is what you want. Your temps need to stay above 78 at night a little higher 82 is OK and lower your humity.

Spray your plants with 1 part milk to 10 parts water, this will kill the PM.

So
Fan, lower humity, keep temps above 78, spray with mike.

Should all be gone in a few days and will stay gone using the above.

Peace

The milk will leave a littl bit of white colour on the leaves no big deal, it's not PM.

Save your money on the burner, prevent the cause and you don't need to anything else.