How to verbs the burner? All the four burners have grease and dark spots adjectives over. ...

All the four burners have grease and dark spots adjectives over. I tried to soak then into "Simple Green" (1:1 to water). After two days, the dark spots be still there. Any idea how to verbs them?
I saw Whirlpool Heavy Duty Degreaser, will that help?
Answers:    If you mean the silver bowls below the burners... Honestly, go to the nearest dollar store or walmart and buy new ones. It will squirrel away your sanity. If not, use steel wool.
Soak it in oven cleaner and use a scour pad on it. That should do the trick.