You should consider buying a new brush head in the following situations:
– Your existing one is 3-4 months old or the bristles are looking frayed; damaged bristles can damage your gums.
– You’ve recently been ill or have tooth decay or gum disease.
– If anyone else has used your toothbrush, you should use a different one!
“Even if you can’t see the wear on your toothbrush, it’s still a good idea to change the head as recommended, as the wear can’t always be seen.”
Read the full story here: https://yourdentalhealthresource.com/when-should-i-replace-my-electric-toothbrush-head/