Remember that "miracle cleaner" for jewelry, silver and metals selling for over $20 years ago, it was a metal plate? The scam was that it was nothing but an aluminum plate. You can get the same results doing this: Take a piece of aluminum foil, hot water and baking soda. Put the aluminum foil in a container with hot water. It does not need to be an extremely large piece. Add your baking soda and dip your metal in that solution and they will be cleaner, without investing in polishing chemicals... Immediately!