Wipe crystal with a damp, soft, lint-free cloth to clean. A simple, ammonia-free glass cleaner may be used. Apply the cleaner onto the cloth, do not spray directly on crystal. Avoid getting any chemicals on surrounding metals. Avoid placing crystal in direct sunlight, as a yellowing of the crystal may occur, as well as a potential fire hazard. Wipe metal occasionally with a soft, damp, lint-free cloth. Finish with a dry cloth. Avoid using harsh chemicals or abrasive fabrics.