Help there's Mold growing on my plants !!!!

Help me Please !!!! I have mold growing on my plants leaves and I don't know what to do. The plants look good and healthy. The humidity is under 50% so, I don't know why I'm having problems. I am however growing in my basement, but there is no water leaking anywhere, it is nice and dry. Please tell me how do I get rid of and stop this mold.:rasta:

do you you have air circulation.

A gallon of r/o water with one teaspoon of food grade H2O2; SPRAY PLANTS LIGHTLY; wait fifteen minutes then turn your fan on. Find the source of the mold; id the mold and you find the source. Some minerial def. look like a rust mold attack. Hope this helps; pictures would.
Note: food grade H2O2 NOT 3% h2o2 from walmart or drug store.