Sterling silver jewelry can tarnish over time due to exposure to air and other elements. To clean your sterling silver jewelry, you can use a soft cloth or a special silver polishing cloth to gently remove the tarnish. You can also use a silver cleaning solution, but be sure to follow the instructions carefully and avoid using it on any gemstones or pearls that may be in the jewelry. It's important to clean your sterling silver jewelry regularly to maintain its shine and prevent further tarnishing.