Stove cleaning, especialy grades.

[CharlieD]

I just cleaned the grades on my stove two weeks ago. And now they are as bad as they were before. I tried to put them in the dishwasher, it did not do any good.
What is your secret to keep them clean? What do you use to keep them clean?
Thank you.

 

[Andy M.]

Oven cleaner. Follow the directions on the can.