I had this issue pop up during week 4 of flower. It is such a pain in the ass. The closer you get to harvest the fewer products you can use. I eventually got it in check, but burned a lot of my really nice looking pistols in the process. Everything turned out okay, but the appearance was not what I was hoping for.
Keep that humidity down so you don't have to turn all your plants into butter!
Yes you really dont want to spray your buds. But since i started to use the Mites and Mildew washout it really works well. I stop spraying about 10 days before chop down, Mites and Mildew recomends 7 days before chop down. My buds turn out great!! Im also maybe going to start doing a bud wash in future harvest. Have you tried washing your buds?
Ps thanks for stopping by!