You might want to clean inner surface of a nozzle – chemically or mechanically.
- Using the hex key from the Supply Kit, unscrew the side screws of the fan shroud
- Disconnect fan shroud from the printhead
- Heat an extruder in order to melt remaining plastic possibly blocking the nozzle thread.
- Unscrew a nozzle from an extruder using a 7 mm wrench for the plastic, and 10 mm wrench for the composite nozzle.
- Clean or replace the nozzle