It is always a great idea to get new pans every once in a while. Which is why I think that Walmart and places like Walmart are a great place to get these sort of kitchen supplies. It is just far easier to go out and get that new pan than to have to scrub it and you never actually get it all clean. So if you have brown and black stains on your cookie sheets then go to Walmart - I just got on for $4….can not go wrong because it cost more for the SOS pads to clean it with!