I put 3 gallons of '24 Chianti into a 3 gallon carboy with an airlock in a #6 rubber stopper just like hundreds of times before. It's been in there after secondary about 6 weeks. I recently tried to take the assembly out and it wouldn't move. I took out the airlock, still wouldn't move. It looks like the #6 rubber with airlock was sucked a tiny bit down into the throat of the carboy and it stuck. I've never had this happen before. I have tried to gently remove it but no luck. Has anyone had this happen before and, if so, what did you do to get it out?