Replacing Nozzle
- Use Compressed Air or Extrude 10mm and Retract 15mm.
Unscrew the old Nozzle.
- Use Compressed Air if available.
Use a Brush.
Screw the new Nozzle on.
- Level the Bed. Smaller nozzles will needle a closer Z offset.
Also see Ender 3: Cleaning Clogged Nozzle.