To easily remove burned on grease, pan drippings etc. from
stove burner grids, soak them in a strong solution of hot water and laundry ammonia. I use a Dutch oven covered
with a lid to protect against the fumes. You can leave it outside if you want. Soak them until the
spills just wipe off. If your
grids are very bad, you can soak them overnight. It doesn't hurt them.