5. Replace Your Toothbrush Regularly
Throw away your toothbrush or change the head of your electric toothbrush at least every two to three months. Otherwise, you're just transferring bacteria to your mouth.
5. 定期更換牙刷
至少每2到3個月就要扔掉你的舊牙刷或者更換電動牙刷的刷頭。否則的話,你就是把細菌往口里送。