Place food scraps into the sink.
Run cold water into the sink.
Turn on the garbage disposal.
Using the kitchen brush (or a rag, spray nozzle or your hands), push the food scraps into the garbage disposal. Let it run until you hear that the blades are no longer grinding (the garbage disposal will run louder and rougher when it's grinding).
Turn off the garbage disposal.
Let the water continue to run for a slow count to five to make sure that all of the food scraps have been flushed down the drain.
Shut off the water.