I hadn't heard of tightening the nozzle while hot, but I'll definitely give that a try
Not entirely sure what "cold pull" means. I unscrewed the nozzle while the machine was powered off and the hot end was room temperature. Blasted the living hell out of the nozzle with a small torch, scrubbed it inside and out with a brass bristle brush, ran one of the bristles through the end of the nozzle. With the nozzle and ptfe out, I heated the hot end to 60 C to loosen the remaining chunk of filament and pushed it out the bottom with the handle of a needle file. It came out in one solid piece. Shined a light through both hot end and nozzle individually and it looked clear.
This is the first print I've done after removing and thoroughly cleaning the nozzle, unclogging the hot end, and adjusting the extruder clamping force. Guess it could be that the bed needs leveling, I haven't checked it in a while.
Honestly starting to think this blue filament is cursed, something goes wrong every time I use it. (I do dry it thoroughly every time I take it out of storage)
Started printing this filament shrinkage test and had to leave the house. When I came back, the whole upper half of the part had shifted after the first few layers, and it left two solid blobs attached and one ball of spaghetti. The magnetic bed doesn't appear to have moved. Part is still solidly adhered to the print bed. How did this happen, and how can I keep it from happening again?
I think I checked the e-steps when I upgraded the extruder (been I while, I don't remember) but I can check again