Brushing is the main strategy for keeping teeth clean. Kids and adults should brush their teeth twice a day with a soft-bristle toothbrush. It is a good idea to brush after having lunch or snacks. According to the American Dental Hygienists' Association, you should switch to a new toothbrush every two to three months and after illnesses such as the flu.
Pre-school aged children should brush with a pea-sized amount of toothpaste that contains fluoride, a substance that helps prevent cavities and tooth decay. It is important not to swallow fluoride toothpaste because it can cause white stains on teeth. For fresh breath, brush your tongue, too. When they are old enough, kids should also floss their teeth once a day.