The hot end on my printer is plugged. I’m trying to remove the Bowden tube, but I cannot get the Bowden tube out. I have removed the clip, pressed down on the white ring, and the Bowden tube allows me to move it only about 1/8 of an inch. I cannot pull tube out (and I continue to press down on the tube coupling collet). I also tried to remove the tube from the other end on the back and also can’t remove it from there. There is filament inside the tube. I’ve looked in the forums for this topic and didn’t find it. I’m hopeful that this community may be able to help. Am I missing a step in the process?