# Replace the Brush > A worn brush cleans less well. Learn the typical schedule, the signs it is time and why illness is a good moment to switch. ## Guides - [The Three-Month Rule](https://how-often-replace-toothbrush.pages.dev/three-months-toothbrush-rule/): The three months toothbrush rule is a common guideline from dental organisations: replace your brush or brush head about every three months. - [Signs of Frayed Bristles](https://how-often-replace-toothbrush.pages.dev/frayed-bristles-signs/): Frayed bristles signs include bristles that splay outwards, lean to one side or look flattened and uneven. - [Replacing a Brush After Illness](https://how-often-replace-toothbrush.pages.dev/replace-after-illness/): There is no need to replace your toothbrush after every minor cold, but many people choose to replace after illness once they feel better, especially if the. - [Replacing Electric Brush Heads](https://how-often-replace-toothbrush.pages.dev/electric-brush-head-replacement/): Most electric brush heads wear out on a similar schedule to manual brushes, so around every three months is the usual advice, with sooner if the bristles splay. - [Storing Your Brush Hygienically](https://how-often-replace-toothbrush.pages.dev/brush-storage-hygiene/): Good brush storage hygiene comes down to four habits: rinse, let it dry upright, keep it apart from other brushes and keep it away from the toilet. ## About - [About Replace the Brush](https://how-often-replace-toothbrush.pages.dev/about/): not medical advice, how the site is funded and how guides are made ## Optional - [RSS feed](https://how-often-replace-toothbrush.pages.dev/feed.xml)