Polymaker TPU 95a sticking on the spool?
I print a bunch of TPU, and a few months ago noticed a change in the texture of the filament. At the same time, I started having issues with the spool. The filament is polymaker TPU 95a in white, ordered from amazon, same as always.
The filament is ...well, stuck to itself? Wedged between itself and the side of the spool or between two strands of filament to either side? It just gets stuck and takes more force than my extruder (prusa core 1) puts out. this has happened across the last 4 or so spools I've used. First half of the spool prints fine, but after that things start getting stuck like this, leading to underextrusion and failed prints.
filament is dried and printed from a Polydryer box, positioned above the printer, so the filament feeds out the front of the polydryer. It's stuck firmly enough that the spool lifts and jams in the box.
Anyone seen similar? Was there a formula change in the last 6 months maybe, or am i just having terrible luck with ordering from amazon?