It's my fourth brew and first in several months. I brewed this five days ago and its been fermenting nicely. I noticed a bunch of crap along ths sides though - this is probably normal but still not sure. I don't necessarily remember seeing this before during fermentation, but it does seem like I've at least cleaned something similar when I've cleaned the carboy later. There's a big blob of something floating though (see top left of photo). I'm not stressed about it or anything, but curious.