Can you remember the last time you replaced your toothbrush ? If your dentist gives you a new one every visit, maybe it was within the last six months. But if they don’t—or if you’re guilty of skipping those routine cleanings —your brush might be languishing. The American Dental Association (ADA) recommends replacing toothbrushes every three to four months, or sooner if they have visible signs of damage. But “I would assume that most people keep their toothbrushes longer than recommended,” says