How long your teeth whitening lasts is up to you. Here are a few tips to help prevent new teeth stains after you've whitened your teeth:
Drink dark liquids through a straw. Drink more water. It keeps residue from building up on your teeth and can help to keep teeth white.
Snack on apples, celery, broccoli, and spinach. They can help "scrub" your teeth clean and help them stay whiter, making your teeth whitening last longer.
Brush and floss your teeth at least twice daily. That nighttime brushing is just as important as that morning brushing. And clean your teeth during the day, especially after eating.
And try products like Optic White® High Impact White toothpaste and whitening mouthwash. WhiteSeal technology in the mouthwash helps prevent future stains from forming, to maintain that freshly whitened smile.