easy to use
I have used whitening strips in the past but found they irritated my gums. I have crowns on my back teeth.  The color is whiter on the  crowns than my normal teeth and I wanted to whiten them to a closer color match.<br />Thought I would try these pens.  So glad I did.  Easy to use. Just twist the end and the gel moves onto the brush.  At first  I was using too much. The more the better right?  It would not dry as indicated. Then I started with just a thin layer so the gel could dry.  Much better.<br /><br />I have been using for about a month now three times a week. It looks as if my normal teeth are lighter.  Sorry I did not take a before photo.<br /><br />I will keep using as I feel it will take more time to remove the coffee, wine and tea discolration.
Rating: 5 stars