Now you can get a brighter, whiter smile even when you sleep when you use the Colgate Max White Overnight Teeth Whitening Pen. This brilliant teeth whitening pen reverses 15 years of discolouration caused by food and drinks in just 3 weeks with continued use. It’s also enamel safe and does a great job at teeth whitening. The Colgate Whitening Pen is super easy to use in just 3 simple steps: 1. Click the teeth whitening pen until a small drop appears on the brush. When you use it the first time, you may need to click it up to 20 times. 2. Make sure your teeth are dry, then use the Colgate Whitening Pen to apply a thin layer of the gel and allow it to dry on your teeth. 3. Lastly, wipe the brush clean with a dry tissue, but don’t rinse it, then replace the cap firmly. It couldn’t be easier to get effective teeth whitening at home with this amazing teeth whitening pen that gives you 35 nightly treatments. Get whiter teeth while you sleep and flash off your dazzling smile with confidence.