20% Buy new ones
0% Run them in the d/w and let them air dry
30% Wash in the sink and let them air dry
10% Wash in sink and warm them in the oven
39% Run them in the ovens self clean cycle
1% Let someone else clean them
One of the biggest problem with gas range surface grates has been rusting...that is where the "warm them in the oven" trick helps. You can soak the grates in your kitchen sink or run them through the d/w, but letting then "air" dry can result in rusting of the grates. After cleaning the grates, warm them ( just a few minutes will do ) in the oven at approx 200-250ºF, this will flash dry the grates and help prevent rusting. Do not run them in the self clean cycle.
This can help - Goo Gone Oven and Grill Cleaner
Related Links