I have been having this recurring issue where my PLA stops feeding part way through my most recent print attempts, but now I can't even get a print to start correctly. I'm using a Crealty CR-10 and have previously had the filament fed properly through the tube and nozzle. Now, the feeder gear is stripping the PLA in the feeder and the feeder wheel doesn't move. While preheating, the extruder is producing warm PLA onto the bed so I don't believe it is a nozzle clog issue, but when the print begins nothing comes out. I've tried taking the feeder spring apart and tightening/loosening it but to no avail. If anyone has had a similar issue and knows how to help I would greatly appreciate it!