I'm in a spring cleaning mood and decided to see if some of my oldest, grimiest baking sheets could be brought back to life. The odds, as you can see, were against me but I came through in the end. A few simple products, an ample amount of time, and a fair amount of elbow grease later, I had great results. Here's what you'll need and what you'll need to know.
1. Sprinkle an even layer of baking soda in your baking sheet, then drizzle hydrogen peroxide over the top. Add another layer of baking soda, so that the texture is that of a paste. Allow the baking sheet to sit for several hours or overnight to let the mixture loosen the grime and break it down.
2. Use a scouring pad to scrub the grime away. (It will take some elbow grease, but stick with it!)
3. Rinse the pan and stare disbelievingly at your results.
4. If you have some spots that give you extra trouble, use a bit of Bar Keeper's Friend in addition to the baking soda mixture. It took care of them for me!