During filament unloading, if the filament breaks off or gets stuck in the drive gears, you will need to clean the drive gears. Below is a detailed explanation on how to do this.
Push down on the black ring in guide tube connector and remove the guide tube from the feed module.
Open the feed module cover.
Unloosen the screws on both sides of the cover.
Note: do not remove them entirely from their sockets – you will be tightening them back up shortly.