Does anyone else have issues with constantly grinding filaments? I have always had issues with it. But after a few bad prints I tightened the hobb which had become slightly loose. That seemed to fix the problem for a few prints. But now my grinding issues have become so bad that I can basically only print models that have no retracting. I can print a hollow box, but not anything like a series of pillars. After a dozen or so quick retract and extrudes it just grinds away and can't push any more out. I tried using a lower retract speed, I tried a lower retract distance, I tried multiple filaments (PLA, nGen, Woodfill). I'm starting to run out of ideas on how to fix it.