I simply adore my ZOOM https://bleach-infiniter.com/zoom-dental-crack/ which works pretty well for me. This method is a more perfect progressive whitening system, which, in addition to having no drawbacks, saves the patient’s time in the dental chair and gently affects the deep and superficial layers of the teeth.
Desi style(Indian remedy) : There is a effective for tooth whiting called, OIL PULL, To oil pull, put 1 tablespoon of coconut oil in your mouth and push and pull the oil through your teeth. Coconut oil is solid at room temperature, so you may need to wait a few seconds for it to melt. Continue the oil pulling for a full 15–20 minutes. It will kill the microorganisms in your mouth, pull out the particles causing tooth discoloration. You also use sunflower or sesame oil. Using the natural oil found in your region will give you the best result. Doing it will also detox your body naturally (you don't need to buy detox products). (I do it).