A lot of the cleaners used on stainless steel are sodium hydroxide / caustic soda. Its very dangerous to play with but will strip grease fat from stainless steel, or from your skin. I used to pick the odd litre up from work, and use it in a heavy duty chemical proof bag to clean grill racks. As I said its very dangerous, especially when you add heat, have seen somebody narrowly avoid being blinded by it.

