A redesigned brush head on the Oral-B iO is just one of its improvements. Photo: Proctor & Gamble It’s easy to mock smart toothbrushes, but most people don’t have very good dental hygiene. High-tech ...

The Colgate Kids battery-powered toothbrush with a beloved children's character, Bluey, is 24% off at Walmart and Amazon, now just $3.79 ahead of Prime Day in October.

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Future There hasn't ...