Did you know that you can whiten your teeth with TIN foil? It sounds wondrous, but believe us that works!
First you need to mix baking soda, salt and water. Then, apply the paste to your teeth. At the end, just apply a layer of tin foil that will cover your teeth.
You need to leave the foil for one hour, then remove the tin foil and brush your teeth as you do regularly.
This method is also recommended by the dentists.