Description: When unloading a filament in Ultimaker, a small piece of molten filament is stuck in the feeder guide tube
Action: To remove the stuck filament piece, remove the blue strip which is at both the ends of the feeder guide tube. Press the white coupler and pull the tube upwards. Tube will be disengaged with hot end assembly and extruder. Remove the stuck filament with the help of long filament and reassemble the feeder guide tube at both the places.