Over the course of time, body oil and skin products can collect on jewelry and leave a residue which can occlude stones. To keep your jewelry looking bright and new, take a soft headed toothbrush with some mild soap and gently brush the front and back of the stones and metal. Rinse thoroughly with tepid water. We do not suggest putting jewelry in an ultrasonic to clean. Steam cleaning works well, but do not steam emeralds or opals as high heat can damage these stones.