2) How to proceed
First of all, you’ll have to make a paste with baking soda, salt and water and apply it to your teeth. Cut out a sheet of aluminium foil, the one commonly used for food preservation, apply it both on the upper and lower arch and let it sit for half an hour at least. Then remove the foil and brush your teeth with your toothbrush and toothpaste. Your teeth will seem whiter and shiny!
