Our baking pans and sheets work hard for us, but the truth is, after a few hours of baking, even the most attentive baker will miss a few burnt on marks or spilled batter in those pan nooks. We all have a pan with the perfect baking patina that we love, and we all have that pan that we are too embarrassed to use that hides in the back neglected because it looks like it would be easier to toss out than to salvage. In some cases it is easier to toss it out and replace it, but all too often, all that tray needs is a little TLC. Try one of these simple tricks for rescuing a ruined baking sheet before racing to the store to replace it.
Stubborn stains always make baking pans look worse than they really are. I love a no-scrub solution (featured on Kitchen Living With Coryanne) for this problem. Start by pouring boiling water into the baking tray and adding a few tablespoons of baking soda. Once the solution stops bubbling, allow it to sit for an hour before wiping away the burnt stains with a soft cloth. Finish the job by hand-washing it with a mild dish soap.
If that doesn't work, you can roll up your sleeves and try this next trick. With a little effort, a copper cloth or even a rolled-up sheet of aluminum foil make a great scouring agent for scrubbing away burnt-on stains. A granulated detergent like Bar Keepers Friend or Bon Ami combined with abrasive scrubbing is no match for an old pan. A little elbow grease will have it looking like new in just a few minutes.
And as a last attempt, and quite possibly, the quickest, place your ruined baking sheets in the oven and turn on the self-cleaning cycle. If that doesn't work, then it is time to replace it.