BRUSHING AND FLOSSING. Overview. Even though weâve been brushing and flossing our teeth for years and years, many of us are surprised to learn that weâre not doing it properly. Case in point: Did you know that proper brushing takes at least two minutes? Most adults do not come close to brushing that long. These four steps are the best and easiest ways to help you remember how to care for your mouth, teeth and gums: Brush at least twice a day with fluoride toothpaste for at least two minutes, especially first thing in the morning and before bedtime. Floss every day â usually at bedtime