A tool is used to unclog your nozzle by forcing the filament through the nozzle.
Heat the nozzle to 5 degrees above the max temperature of your filament and insert the tool into the filament path.
Make sure to loosen off the pressure on the drive/gear to avoid damage to the teeth of the drive gear.
As you push down make sure to counteract the downward pressure to avoid bending the rods.
Genuine Flashforge Spare Part