Thanks for sharing this to us. Good food may save us from being dirty teeth. The techniques you shows us are awesome, we can do them more white as we can by using following that methods, actually I wanna say some thing that if we care our teeth from our childhood we can be able to whiten in every time of life, teeth, I think flossing is much important otherwise a black layer will cover our teeth by time.
In some previous days I felt a pain in my teeth I was unable to eat food, I went to clinic and they covered my teeth with a silver (I think) formed shape, 3 days ago this cover leave my teeth and up rolling in my mouth now