Cant tell any difference at all other than my teeth feeling cleaner after 6 minutes of brushing. I tried twice weekly no change, to brushing twice daily still no change and no I dont smoke, I did but quit 3 years ago and I wasnt a heavy smoker, drink perhaps 2 cups of tea and dont drink wine. The images used to advertise I think AI must of been involved. I've asked AI about the best teeth whitening with long lasting results and my sweet smile didnt even come up. I also bought the precision pen, that was a joke went on ran straight off. Great if you feel like brushing your teeth for 6 minutes morning and night for no effect other than clean teeth. I've got better things to do with my life. Do your reaserch people!
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