This technique is especially good if you have intricate filigreed jewelry for example.
*or at least they don't SMELL toxic. Are they?
Step 1: Put baking soda and foil in water
Boil it until the silver starts to look silver.
(Unfortunately this doesn't clean my burnt up old pot) ;)
Step 2: Voila
(The black part on the leaves in the jewelry shown here is intended to be black. You can see the rest came out silver.)