Quoted from Nokoro:
Cold pull = heating up the hot end, pushing some through to extrude a little, letting nozzle cool to 90, then yank it out. It is a way of removing gunk from the nozzle that may be causing clogs. It worked for me before, but I can’t do it anymore.
All the issues I am having seem to point to moisture issues, but I can’t be sure. I’m thinking about buying the Sunlu filament dryer and seeing if that helps. I hate to keep throwing money at things without knowing for sure what the problem is.
Cold pull - got it.
There is a method to dry out filament in the oven, maybe you can give that a try just for the heck of it. If it works, then maybe buy the real filament dryer gizmo.