I may be the last person on earth to discover this but twice in the past week I've had to clean up hard, crusty, sticky, burnt-on messes. Once on stainless steel and once on glass. In desperation I threw a scoopful of Oxy Clean powder in the glass dish with some hot water and half an hour later the impossible mess was soft and oh-so-easy to remove with a scrubby and some dishsoap. It worked today on stainless as well. I am shocked at how easy it was. I'm not sure I'd use it on aluminum but I know how I'm going to tackle my broiler pan next time I make lacquered pork ribs. Thought I'd pass it on.