Jewelry tarnishes if it is overexposed to the chemicals in makeup, which are often harder than the jewelry itself and can scratch the piece. Also, soft metals may corrode on skin that has a high salt content, meaning sweaty skin. Make sure you remove your jewelry on occasion, especially before bed, but here is a scrub to restore brilliance in your necklaces, bracelets and rings.
Dissolve 2 antacid tablets in a glass of water and use to soak dull or tarnished jewelry. Let soak for only 2 minutes, then rub dry. The effervescent tablets release bubbles that will attach to the jewelry and remove any dirt or dust. As the bubble rise to the surface, so do the stains.