milk is at best a bandaid...just as 1/2 cup of 3% hydrogen peroxide or Baking soda
PM is a airborne spore it attaches to your plants surface and roots into your leaves or stems.
You will need a 100% total obliviation of all spores in one shot
My 2 cents for whats its worth....Buy 1 can of FUNGAFLOR this is a fungal areo bomb...use this on your grow area.... kills all spores on the walls ceiling equipments ect.
Its like using a sulfur vaporizer.....100% coverage of all areas(up to 1000sq ft a can).... but you dont get that rotten egg smell
.........................Before you use the bomb..... spray plants and remove them from the grow area for the 3-4 hour period............................................
If in flower ....you want to spray your plants with a combination of 3 scoops GREENCURE & 1/2 cup of h202 mixed in a 32oz spray bottle of water...totally organic
spray 100% of all your plants... tops bottoms, (leaves) stems, potters, dirt top....best to spray during your light hours so buds can dry
If in veg... get EAGLE20 its a systemic fungicide...kills the pm from the inside of the plant....you want to spray outside (smells dieslly)
Add 2 scoops of Greencure to your eagle20 mixture.... the spreader in greencure provides a even leaf coverage
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After the 100% cleaning process....You need a dehumidifier or 2 and some fans.......Also you will need to filter all incoming air... PM is airborn pest