Do you know how to clean Sterling Silver? Well if you don't, you will by the time you finish reading this.
I have to buy all my jewerly in sterling silver because I'm allergic to nickle (most cheap jewerly is made from nickle) The problem with Sterling Silver is that it tarnishes really easily. So every now and then I pull out all my earring and necklaces and bracelets and I clean them.
Place aluminum foil inside bowl, shinny side up, place all your tarnished items inside.
In a smaller bowl combine 1 Tbsp Baking Soda and 1 C. Water, mix and pour over items in bowl. Let your items soak for a few minutes.
It's as easy as that.