Pinner says "Ok, I just tried this and it seriously did work. I did it twice on a burner that's had scorch marks for a year or more and they're gone! For anyone as OCD about cleaning as I am, this is a must! I would be prepared to do it at least twice, more if you've got bad burns. This really works!!!"
How to clean your garbage disposal. Start by running hot water through your garbage disposal for a minute. Pour about 1/4 c. baking soda into the drain. Flip the garbage disposal on for 2 seconds, just to whirl the baking soda inside, and then leave it alone for 10-15 minutes. Follow with 1 c. of vinegar. Watch the bubbles erupt out of your drain. (Yay!) Rinse through one last time with very hot water and run your garbage disposal for 5 seconds.