"This isn't earth shaking and only the latest in a line of personal successes. I smoke .. I know - ugh - and it is past cleaning time for the teeth. I really looked at them this morning - there was NO STAIN from tobacco & coffee on the inside of the lower teeth. Absolutely none - they look just like after a cleaning, only better, in that the "clean" is more uniform & natural looking. I know my mouth - they would be stained at this point in time. And furthermore, they literally "squeak" when rubbed .. obviously no plaque! I'm forever being surprised with little things like this that I didn't expect. We take about 1-2 oz/day, I guess, all said & done. The spraying of the mouth GOOD before bed is to me, the most important of all & done religiously."