How to whiten your teeth FAST! by How to whiten your teeth FAST!the top is BEFORE & the bottom is AFTER● Add baking soda, whitening toothpase, and lemon juice together. ● Mix everything togther until it makes a paste. ● Put the paste on your finger, and apply generous coats on your teeth. (don't forget your molars!) ● Let the paste sit on your teeth for 2-5 mintues ● Wash off and brush your teeth noramlly. ● Enjoy your beatiful teeth!! :)