Philips Sonicare is launching a new smart toothbrush that connects to an app via Bluetooth. I know, the first thing you’ll say is: why do I need a toothbrush that has Bluetooth? And that’s a valid question. You probably don’t, but you might if you really care about oral hygiene and don’t mind spending more time than most people brushing your teeth in the morning and night. The new toothbrush, whic