So, I was suffering from thick post nasal drip that sticks in my upper throat ánd these scabs for 15 months now. Visited 3 ENT's because it was driving my crazy. 3rd ENT advised me to do nasal rinsing with xylitol/baking soda/salt mixture for a month, since xylitol is known to break down biofilm. After the second day of rinsing a huge thick mucus glob (yellow/green with blood) was dislodged from deep inside my nose/sinuses. It felt so good afterwards and since then my nose is actually running like crazy and I blow out tons of green snot. No thick, sticky post nasal drip all of a sudden, but everything is coming out at the front like it should. It's crazy to be so happy with having a cold, or at least it feels like that. The rinse made everything move, that's for sure. I'm 2,5 weeks in now and still everyday thick mucus globs come out after the rinse, some of them are shaped just like the scabs. I need to hack it up via my nose into my throat. In case you haven't tried the xylitol rinse, give it a try! Starting to think that these globs of mucus were stuck somewhere and prevented/blocked normal mucus draining. It's too early to get my hopes up that this is the end of the PND horror and the scab, but who knows. Seems like there was an infection high up there all along. See picture for the sachets that I use.