When my bling loses its lustre, I restore it’s shine with Connoisseurs Jewelry Cleaner. You can pick it up at any drug store. A quick dip, a little scrub, rinse with warm water, and it’s like new!
BTW, it only works with real silver, gold, and platinum.
(I took this pic with my Kodak Z980 – look how close I can get with the zoom!)