u/Fluid-Tip-5964

I have used the DXC extruder for a few months and it works fine except that I can't pull the filament out to make a change. Retract looks like it is working but the filament is gripped tight and won't pull out. Squeezing the lever doesn't help.

What am I missing? Hitting extrude repeatedly to clear the bowden tube works but is slow - which brings up problem #2. The tubing will not pull out the push-connect fitting so I just can't cut it off the filament at the top of the extruder.