Have you ever wondered how to brighten those aluminum cooking utensils that have been discolored through use? Mix two tablespoons of vinegar with one quart of water and boil the solution in the pan for about ten minutes. You can prevent discoloration in double boilers or egg poachers by adding one teaspoon of vinegar to the water in the bottom pan. Tea pots can be cleaned by boiling equal amounts of vinegar and water in them and then letting it stand for an hour. Aluminum Vinegar Magic.