Unplug the electrical cord of the garbage disposal from the electrical outlet before attempting to unplug any backup in the unit.
Insert a one-quarter inch Allen wrench into the slot on the bottom side of the garbage disposal and turn the wrench back and forth to loosen any obstructions inside the unit.
Pull out any materials that might be clogging the garbage disposal around the masher plate until the unit is free of anything backing up the system.
Locate the red reset button on the bottom of the garbage disposal and push it in to reset the unit.
Plug the electrical cord of the garbage disposal into the electrical outlet.
Run hot water from the faucet into the garbage disposal for one minute and with the water still running, turn the disposal on to verify it is no longer backed up.
Shut the hot water off.