So far...I have come across 2 remedies, One for sure, but you need 150 bucks, the other is a 50% cure, due to what I like to call the "Lotus syndrome" (believe it or not, mildew spores can build a resistance to treatment over time.)

1st treatment...this is said to work 100% period. Sulphur pot. It is an electric element that cause pure sulphur (you add) to melt and omit a gas...which kills the mold/mildew dead!

2nd treatment I found is old school home remedy...Add 2 tsp baking soda to gallon of water, and ph up to 9.0ph
mold/mildew do not like to live in alkaline ph conditions.

Couldn't afford sulphur pot, but I mixed baking soda alkaline mix to try for immediate treatment. peace