To clean 925 sterling silver earrings and prevent tarnishing, regular use of a special silver polishing cloth is recommended. Alternatively, the earrings can be cleaned with a mild soap solution, water and salt wrapped in aluminum foil, or with special silver cleaning solutions. It is generally recommended to remove jewelry before showering and exercising, as chemicals in shampoos, sweat, and chlorine can damage the material, promote discoloration, or reduce its lifespan.