It begins typically in high temps and high humidity. Usually the first sign is in the largest cola: a twisted or dying sugar leaf. Once you spot that you have to act fast. Once it gets going, you can easily detach sections of calyx and leaves from the already-rotting stem. I just had a case today, I was expecting it, the cola was like my forearm and dense. I cut and trimmed it immediately and I'm rapid-drying for 24 hours to quickly reduce humidity. I only lost a tiny amount. But you have to be really vigilant, check bud twice daily, and if you see that, chop and trim most brutally fast.