Want a simple, effective kitchen cleaner? Combine some bicarb soda and hydrogen peroxide for a "miracle mixture" that can turn old pots and pans, baking trays and cooking utensils from grimy to shiny.
If you soak the offending items in this mixture for a few hours, you don't even have to scrub it in, the ever-resourceful One Good Thing by Jillee blog reveals. Jillee put a layer of bicarb soda on her cookie sheet with baked-on crud, followed by hydrogen peroxide and then some more bicarb soda and...just let it sit. A little while later, wiping the mixture off revealed most of the gunk came right off, and a second application improved the results even more.
Alternatively, you could mix 1/4 cup bicarb soda and enough hydrogen peroxide to form a paste and scrub in this miracle paste to deal with all kinds of dirt, grease, and grime.
New Life for Old Cookie Sheets...Again. [One Good Thing by Jillee]