Got Bot?
Let us not confuse Mildew with Mold. They are NOT the same. I have never seen botrytis mold indoors in my grows.
This is what we are talking about -
https://en.wikipedia.org/wiki/Botrytis_cinerea
I get this _every_ year in outdoor grow. The deal is it spreads like wildfire up the stem
INSIDE the buds. Usually the first tell is a sugar leaf in the denser part of the bud seems to die and brown (quickly). If you spread the flower open at this point, you will see the infection. IF you are lucky, or have a strain that tends to spread out flower nodes, you can surgically remove the bad bit. You have to check below and above that flower for ANY sign of brown die-off. Discard anything infected.
If ambient humidity is low, the die-off becomes powdery. Which means any manipulation of the infection will spread mold spores. If ambient humidity is higher, it can be almost like a slime. If you fail to remove an infection before putting up for cure, the mold will continue to spread and consume until either A: humidity drops low enough to halt growth or B: The mold cannot believe it ate the whole thing (burp). My first couple of grows years back were almost sacrifical in that I lost half the grow to this mold. And every agricultural effort in this valley has similar problems they spray their way out of.
So depending on ambient and overnite humidity - this can consume the entire cola in 3 or so days. AND the spores are now airborne, so time is of the essence. I take branches one at a time and find and remove affected flowers or toss if not limited to a small area. Once you can see the evidence in the picture starting this thread - that flower and probably the ones surrounding are all toast. Clipping it off while on the plant, and not immediately harvesting to parse the bad parts, rarely works.
This year I grew a Zimbabwe Poison - awesome, huge dense buds. I lost some of it, but not all because I knew it was likely coming and pounced before the Bitch Bot claimed it for her own.