Most garbage disposal systems require a 1/4-inch Allen wrench to free up the impeller. Most garbage disposal systems come with the appropriate Allen wrench to do this; however, these can easily be lost, especially if the garbage disposal system was already installed in the house.
Once the user has the correct size of Allen wrench, he or she needs to turn off the power to the system. To free up the blockage, it is necessary to locate the drive shaft lug. The lug is a hexagon-shaped hole that is on the underside of the disposal system. The user needs to insert the Allen wrench into the lug and move the tool back and forth until the blockage starts to break down. It is necessary to keep working the wrench until the debris has loosened up and the garbage disposal system is clear.