Colgate has launched hum by Colgate, a smart electric toothbrush. The product has smart sensors that make it simple to track the frequency, duration and coverage of a consumer's unique brushing style, and provide personalized guidance helping people target spots that need extra attention. While most people miss 40% of their teeth when they brush, hum by Colgate can help consumers achieve 50% better brushing efficacy, said Colgate.   A toothbrush that's anything but ho-hum! ...