I hve about 20 used full size sheet pans. They are covered in semi burnt oil or cooking spray, even the bottoms are sticky. I've tried Dawn, Brillo pads. oven cleaner (lye) and vinegar. with not much sycess. We dont have a mechanical DW so I'm doing these by hand in the 3C sink. Is there a commercial cleaner for sheet pans or a soaking method.
