White vinegar + Baking soda
There are many ways that you can clean your sterling silver jewelries, some people might use silver clean solution, and here we are telling you how to mix your own solution, it's quite simple actually, what you need is just white vinegar and baking soda, mix half cup of white vinegar and a couple spoon of baking soda, soak your tarnished jewelry in the solution for a few hour, then you will see the magic, an old dingy jewelry looks like it's brand new.