Heat N Kleen is designed to remove grease/carbon easily by the heat and soak process. It cleans grease, oil and softens carbon deposits. Use 2 oz. per gallon of water daily for sparkling clean kettles that will be the envy of all your home theater neighbors. Heat N Kleen is safe for all metals, aluminum, stainless steel, iron, chrome, brass, etc... 15 oz. supply per order