To clean sterling silver pieces, use a silver cleaning cloth or a cleaning agent that has a sulfur base. If the surface becomes scratched, take your jewelry to a professional jeweler for polishing. If possible, store in an anti-tarnishing bag. Clean gold-filled jewelry regularly using sudsy, lukewarm water or by bringing it to a local jeweler. When exposed to dust, moisture, perspiration and makeup, gold can lose its luster. Keep gold-filled jewelry away from chemicals, especially chlorine. Store away from other metals, wrapped in a soft cloth.