Get a spray bottle and mix a 50/50 solution of 3% hydrogen peroxide and water. Spray the entire plant, under the leaves too, at LIGHTS OUT! This will kill the mold.
When the is ready for harvest, do a wet trim and remove as many leaves as you can, then do a bud wash. One cup of 3% hydrogen peroxide in a 5 gallon bucket of water, gently swill the colas around for about 30 seconds, then rinse in a 5 gallon bucket of water only for another 30 seconds. Very gently remove excess water. I hold the bun in my hand, branch going up to my elbow, and spin in circles like a giddy school kid until I’m dizzy. Hang from the shower curtain rod with a fan gently blowing on it for a couple hours, then dry as you normally would.
I did this yesterday morning at lights out to mine in my tent, by the time the lights came on, plant and buds were dry and no sign of PM. And mine are about 2 weeks from chopping, so safe to do on flowers (and really, what else can you do? Can’t let it spread untreated!).
Welcome to the forum, @Buggy!