Dentists spent a century trying to get you to floss. Dyson stopped asking, built a $499 brush that does it for you, and then charged $11.50 for the toothpaste that stays out of its way. The CDC looked at 9,000 American adults and found 32% never floss. Only 30% do it daily. A hundred years of nagging and the number barely moves. So Dyson removed you from the job. The brush takes 28 photos a second, spots a gap, and fires a cone of mouthrinse into it within 100 milliseconds. You brush like a…