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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 you're scrubbing. A built-in accelerometer clocks the angle, while your phone's front-facing camera tracks its location and your dentures. As you brush, the companion app highlights the places you've cleaned and the spots you might have missed. So of course, we had to try it for ourselves and see if it's worth the hassle.
