Burbank Teeth Whitening

Any over the counter or home remedies you can recommend for whitening teeth? Going to the dentist is too expensive an option.

I have recently found that i cannot use the normal mouthwash and the type that says whitening anywhere on it because an ingredient in it causes my throat to swell. So i was wondering if there are any teeth whitening remedies that i can use or homemade mouthwash seeing as i cant use the storebrands. Please no rude comments, and yes i do brush my teeth 3 times a day 5 min each.