1 glass jar or bowl (an empty salsa jar works good)
1 cup hot water (heating water in microwave for a minute or two is hot enough)
1 tablespoon baking soda
1 tablespoon salt
1 tablespoon dish washing liquid (joy, dawn, etc.)
1 piece aluminum foil (big enough to fit on the bottom of jar or bowl - shiney side up)
1 plastic spoon
1 towel
Instructions:
Place aluminum foil in bottom of jar or bowl. Heat water and pour into jar or bowl. Add baking soda and salt to water and dish washing liquid. Stir slightly. Place jewelry on top of foil and let sit for 5 to 10 minutes. Remove jewelry with plastic spoon and rinse in cool water. Dry jewelry on a towel thoroughly. Polish with something like Flitz (non - skin irritating polish comes in liquid or cream) to keep jewelry from tarnishing for up to 6 months.
This works well for gold-filled, brass, german (nickle) silver, and sterling silver. I have even cleaned jewelry with freshwater pearls, shell cameos and mother of pearl with no problem. Works just like the product called "Silver Magic" only cheaper. Customers can use this method at home too!