A method of removing solidified sprue plastic from an injection molding machine uses a picker assembly that includes an end-effector with a gripper. The injection molding machine has a stationary platen with a first mold, and has a moveable platen with a second mold. The method includes moving the gripper in a direction that is generally perpendicular to a direction that the second mold moves while the first mold and the second mold are opening. The method also includes grabbing the solidified sprue plastic before the first mold and the second mold reach a fully open position.