Heat creep or bad filament? (E3D V5 / fiberlogy Easy PLA)

[TommyDee]

I'm just going to put it here just in case.
Is this filament flattening significantly through the filament driver mech?

I have this issue due to a fixed gap at the driver. All works wonders until that one print that does a lot of retractions. The filament that rides back and forth in the driver just flattens, and widens the filament.

How much flattening will our bowden tubes tolerate? That depends on the bowden tube. I now make sure my bowden tubes are at least 2mm ID. I push a bike spoke through the tube and it get stuck, the tube is too small.
Haven't had an issue since.

[BrokeIn3D]

Mine is a direct drive, but no the filament does not flatten under pressure.I did a quick burn test to compare the two and the Easy PLA caught fire very quickly and dripped like molten wax it was super runny, the green PLA took the flame just as quick but burned much less vigorously and even extinguished itself at one point, i reignited it and as it dripped down i noticed just how much thicker it was.