How to use a new toothbrush? Soak it in hot water and take it out until water becomes cool. You can use the toothbrush after it become totally dry.

• 一只新牙刷到手，该如何使用呢？应该先将牙刷浸泡到热水里，直到水温变凉再取出，并等待它完全干燥后再使用。