Scrubbing with a toothbrush that knows when you missed a spot
 

Mobile World Congress is predominantly about smartphones, however look hard enough and you'll find all sorts of other surprises too. Take Oral-B, which chose Barcelona as the place to announce the B-Genius, a new toothbrush that knows exactly where y...

http://www.engadget.com/2016/02/27/s...ts-youve-miss/