Strange problem since I swapped back to a partially used reel of filament - it seems to get stuck and start to grind, and then obviously stops feeding through. I'll post a couple of videos later to illustrate; I've tried different amounts of pressure on the extruder but it doesn't help. This filament was fine about a month ago and I've kept it in a bag with a silica pouch, but all I can think is that it has somehow become softer. But if that's the case why doesn't it do it all the time? If I extrude 30mm manually, it starts to fail about half way through. Help!