I need assistance replacing the PTFE tube in the nozzle on our Flashforge dreamer
I got the same issue before. When you tried to push out the material from the tube, one end of the tube was being pressed. The tube was so soft that the diameter at that end was slightly increased. Hence it was difficult to put the tube back. When you tried to tighten the screw, more force applied and the tube end was pinched more. I got some spare tubes from the supplier. I simply replaced the tube. The PTFE tube could be pulled off from the nozzle.