Powder Mildew 20 days before harvest

So I have a beautiful crop coming in mostly of blue dream and some snow dog nd chem D. however Iam about 20 days away from harvest and powder mildew is going to take over if I dont keep it in to submission. I have been spraying with serenade organic spray which does an ok job but cant finish the job with the mildew and I dont really want to spray anything else getting so close to harvest. I am wondering if yall have any other recommendations? I can not burn sulphur because I grow in an indoor closet and can barely move the plants because they are all tipping over because of the huge colas which presents another problem. The plants are in a fairly tight space and are kinda falling together which I belive is compounding the prob. Do yall see any other options than early harvest?

I spray them with greencure.. greencure that what they use for tabccoo c.o .. check them out .. good luck ..

I use Safe Garden's Fungicide 3. It comes in a blueish green bottle of concentrate with a purple top. It claims you can use it up to one day from harvest, however that is for fruit and veggies you eat, not smoke. I wouldn't use it with less than 7 days to go. I suggest you disinfect and scrub that grow room down after you harvest. You may also want to spray air near room once in awhile with Lysol to kill airborne mold and mildews.