this link from Crafted Love...
glass or plastic dish
plastic or wooden spoon
Boil water in a kettle or pot...
While heating, wrinkle up a sheet of aluminum foil and line the bottom of your dish.
Lay your silver, single layer, on the foil and sprinkle heavily with baking soda.
You'll start to notice bubbles and and a sulfuric smell...
Now, drain and rinse with water and wipe with a cloth.