Your Blower Joe SBJ604E comes with an anti-clog vortex impeller designed to prevent clogging when mulching. If your unit does become clogged, unplug the power cord from the unit, remove the upper suction tube, and use a wedge to remove any debris from the vortex impeller. For any further assistance, please contact Snow Joe   Sun Joe Customer Service 1-866-SNOW JOE (1-866-766-9563) (Mon-Fri, 9AM-7PM; Sat and Sun 9AM-4PM EST).