We haven’t tested the 4300, but we did love the 9900 in our review of the best electric toothbrushes, so we’re willing to bet this one lives up to those expectations. It has a pressure sensor, meaning it’s safe to use on sensitive areas and gums in need of a gentle brush, and it includes… Continue reading Final chance to save 73% on the top-rated hum by Colgate electric toothbrush this Prime Day