Top three tips for like new baking sheets👇 So, I put cleaning my cookie sheets off for far too long... And, while several of the methods above would work for a less severe case, I needed to use my oven. I run the self cleaning function on my oven about twice a year. So when you have your next scheduled clean go ahead and pop your cookies sheets in. If you have non-stick cookie sheets, this might damage that coating. But, if you don't (like me) it's totally fine. Give them a rinse with soapy wat