After produce the pellets, Part of the raw material left on the screw, how to clean the screw? 

First, add the oil raw materials (Oil accounts for 15% of the total material) into the hopper in video. Oil materials are extruded in pellets. 

Second, Remove the mold, and add the water, open the screw motor.Observe the shape of the material until the water is out, indicating that the screw is clean