Here are the steps I followed... quick and simple.
Deep Cleaning with Vinegar
- Place the grates in a large plastic bag, such as a garbage bag.
- In a plastic of metal dish stir together one cup of vinegar and half a cup of baking soda.
- Pour this solution on the racks.
- Close the bag and leave it overnight.
- Rinse the gunk, which should now be loosened, off in the kitchen sink or with the garden hose.