How to clean silver-plated jewelry?
Just like with sterling silver, silver-plated jewelry does tarnish with time. Keep in mind that this type of jewelry has a thin layer of silver covering a non-precious metal. In this case, cleaning should be gentle so that one does not expose the base metal.
The silver oxidizes, or turns black, due to its reaction with atmospheric elements, chemicals in common products, and cosmetics.
To clean your silver-plated jewelry at home, mix a few drops of gentle dishwashing liquid with warm water in a small bowl. Wet a soft cloth with the soapy solution and rub it gently against the jewelry. Keep the piece soaked in the solution as you scrub. Pay attention to the edges and grooves, as most dirt collects here. Rubbing it thoroughly for about 10 minutes should remove most tarnish. Rinse the piece with clean warm water and wipe with a lint-free cloth.
Always store silver-plated items away from moisture. You can enclose it in a re-sealable plastic bag separate from other pieces if you do not have a box specially designed for this piece. This will prevent oxidization resulting from moisture, as well as scratches and other damages caused by contact with abrasive materials.