Soak the flower nail in warm water and it will start to spit sand. The water temperature should not be too high, otherwise it will directly burn the flower nail to death.

2.

White vinegar Dropping some white vinegar in warm water can make the flower nail spit out sand quickly. If there is no white vinegar, you can also use other vinegar.

3.

Sesame oil can also add some sesame oil to warm water, and it can also make the flower nails spit out more sand.

4.

Cooking wine when opening the flower shell, drop some cooking wine, which can make the flower shell spit out all the remaining sand.