new to making starters. i usually pitch on the colder side ala JZ. so when i refrigerate my starter overnite and it floc's out, and i go to pitch, it seems like there is a big chunk of yeast stuck on the bottom of the flask. swirling won't dislodge it. has this happened to you? i was tempted to star san a spoon or something and go in there, but didn't want to risk it.