Whitening pens are great for quick

https://devinjdan182.cavandoragh.org/in-office-vs-at-home-teeth-whitening-your-guide-to-professional-teeth-whitening-gilbert-and-affordable-teeth-whitening-gilbert-az-1

Whitening pens are fantastic for fast, localized touch-ups on edges or near the gumline; let the gel dry before consuming or consuming for best adhesion.