Place your silver sterling jewellery items that need cleaning in a small aluminium pan. If you don’t have an aluminium pan, take a glass dish and line it with aluminium foil.
Spread a thin layer of baking soda over the sterling silver jewellery.
Pour enough boiling water to completely submerge all of the jewellery pieces. You will notice bubbles in the dish, and also a rotten egg like smell coming out of the mixture. Don’t worry, it is hydrogen sulphide gas that has been formed by the cleaning action and will not harm your jewellery.
Take a wood or plastic utensil and gently move the jewellery pieces around to make sure all of the sterling silver surface come in contact with the baking soda solution and the aluminium foil.
After some time you will notice that your silver jewellery has started sparkling again.
Once you are sure that all the tarnish is gone, remove the jewellery from the dish and rinse it thoroughly under an excess of tap water.
After having washed all of the jewellery pieces, wipe them gently with a soft towel.
Polish your cleaned sterling silver jewellery with a soft cloth.