Take it in store for a professional cleaning.Cleaning silver is not like cleaning gold. Cleaning gold means removing surface oils and is easily done, the best solution is lemon scented amonia with a few drops of dishwashing liquid, followed by a thorough rinsing in cold water. Silver, however, is another matter. You need to remove tarnish, which is done by a chemical reaction. Pretty much all silver cleaners will work by soaking them for just a few minutes, then rinsing with cold water. Tarnex will work just fine, but your local jewelry store should have specialized silver cleaner. VERY IMPORTANT! NEVER put gold jewelry in silver cleaner especially after silver has been in it as it will turn the gold odd colors and will require much professional polishing to restore! Also NEVER use toothpaste, as it’s difficult to get all of it off and you get “clumps” of dried toothpaste on your jewelry!