Although they’re known to work slower than whitening pens, whitening strips are also an affordable option.
It often works well to use the pen after you’re done eating for the day before you go to bed.
If you don’t want to use regular floss, try using plastic flossers instead.
Make sure your teeth are as dry as possible before applying the whitening product. Whenever you whiten your teeth, be sure to work in front of a mirror.
Avoid getting any of the whitening product on your gums. Twist the pen if the tip doesn’t seem to have any product on it. [7] X Research source
As you wait, try to avoid swallowing the serum. Leaving the solution on for 20-30 minutes and avoiding activities that can dislodge the whitener from your teeth can also help the success of treatment.
If you think you’re able to spit out all of the product, don’t worry about swishing or gargling.
Apply the product twice daily if the instructions allow. Some products might not show results right away. Be patient, and continue using the pen for several weeks before deciding if it works or not. [12] X Research source That said, when used daily over a 7-10 day period, most pens will show visible results.