You can scrub as much as you want, but some stains and discoloration just won't come off of your stainless steel cookware with scrubbing alone. Fortunately, you can brighten those pans up with some cream of tartar.
Picture: Cooks & Kitchens
Reader's Digest shows us an easy way to bring the sparkle back to your stainless steel cookware. Just dissolve a couple of tablespoons of cream of tartar in a quart of water. Boil the mixture in the pot or pan for about 10 minutes. When the pan cools, wash it as normal and watch it shine.
3 Crafty Ways to Use Cream of Tartar [Reader's Digest]