an automatic debris removal apparatus for a wiper system that removes soluble and insoluble debris trapped between the wiper blade and the glass surface by lifting the wiper blade off the glass surface and then causing the wiper blade to drop onto the glass surface as a shake under urge of the biasing spring of the wiper arm , so as to thereby provide a shaking action which frees any trapped debris . an actuator selectively interacts with the pivotal portion of the wiper arm to effect shaking of the wiper arm to thereby free the wiper blade of the debris .