Hi, personally I use the zoom whitening method and bought a light guide philips zoom for that purpose https://bleach-infiniter.com/zoom-dental-guide/ This gives me the opportunity to get excellent results. Guaranteed result - whitening up to 6 tones, sometimes it is possible to achieve the effect up to 8 tones. Plus it is safe and reliable.
Over time, coffee, red wine, tea and soda will discolor your teeth. Cutting out teeth-staining drinks is a successful first step if you're serious about a white smile, but not always fast.