To clean gold-plated jewelry, use a soft, lint-free cloth to gently wipe away dirt and oils. Avoid using harsh chemicals, abrasive cleaners, or ultrasonic jewelry cleaners, as they can damage the gold layer. If needed, mix mild dish soap with warm water, dip a soft cloth into the solution, and gently wipe the jewelry. Rinse with clean water and pat dry with a soft towel. Always store the jewelry in a dry, air-tight container to prevent oxidation.