(Image credit: Colgate/ Future) October is a great time to invest in a new electric toothbrush for your little ones. Not only is it National Dental Hygiene Month, when the importance of good oral health takes the much-deserved spotlight, but it is also one of the best times to save money on dental care essentials. Plenty of electric toothbrushes get heavily discounted in the run-up to Prime Day, and we have already seen some truly irresistible deals. This one is particularly unmissable — the C...