This pack (medium or soft) will allow you to replace your toothbrush head for six months. A toothbrush head should be changed every three months.
To change it, soak the top of your toothbrush in a glass of water for 5 minutes, then you simply need to gently remove the head by slowly pushing it from the back. Then, grab a new head and place it on the top of the toothbrush while it's still wet. Only do this every three months to not put a strain on the wood.
⚠ Don't throw the used heads away. Bring them back to a Comme Avant shop or a Terracycle recycling point.