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. 定期更换牙刷
至少每2到3个月就要扔掉你的旧牙刷或者更换电动牙刷的刷头。否则的话,你就是把细菌往口里送。