Worn heads damage gums

When brushes are made, the nylon bristles are first cut to the same height, leaving sharp, jagged edges. The end of each bristle is then rounded into a soft dome to make them less abrasive and ensure they don't scrape away enamel or gum tissue. As you brush, the bristles return to their original jaggedness, which can cause gum recession and wear away enamel. This is why it is recommended to replace them every three months, or when you see signs of wear.

Germs are a-plenty

This may seem like the obvious one, but it shouldn't be ignored. The American Dental Association recommends changing your brush head every 3 months to prevent bacteria from building up in the bristles, affecting your oral health and general wellbeing. A bathroom can be a hotbed for bacteria, particularly if you are prone to bad habits such as flushing the toilet with the seat pan up!