Inside Kettle Cleaner. Formulated to clean the inside of your popcorn kettle. Heavy-duty cleaning and degreasing of the interior kettle surface without damage of scratching. Regular use maintains your kettle for more efficient operation and longer life. A clean kettle makes for better tasting popcorn, too! Avoid contact with skin. Place two teaspoons of powder and two cups of water in kettle and boil for ten minutes