How often should you change your toothbrush and how do you know when it’s time? The toothbrush is a hygiene item that in some cases is not replaced often enough. You should replace your toothbrush as soon as the bristles on the brush start to spread out in different directions. It’s the tips of the bristles that scrub and clean your teeth. In order for them to reach into all the small spaces and clean properly, they need to be straight and fresh.

As a guideline, we usually say that three months is a reasonable lifespan for a good toothbrush. Then it’s time to change it. Depending on how hard you brush, you may need to do it more often.