Apparently, it's not just for fries. Ketchup can clean copper because it contains vinegar, a mild acid that removes oxidized layers from the metal. This method works best for small copper areas, but ...

Ketchup is one of the most versatile condiments around. When we're not slathering it on our burgers and fries, we're mixing it in cocktail sauce, barbecue sauce, and comeback sauce. Ketchup is also a ...