1. Prepare two pots. You can prepare two pots, put the flower nails in one pot and add some water, then pour the other pot on top of the pot with the flower nails.

2. Shake up and down. Grasp the joint of the two pots with your hands and shake them up and down. Under normal circumstances, shaking it about five times will make the flower nail spit out a lot of sand.

Step 3 soak in salt water. Soaking the flower nail with salt water can also make the flower nail spit sand. After a long time, the sand spit is not clean.

4. Soak in warm water. You can soak the flower nail in warm water of about 50 degrees, and the flower nail will absorb more water for self-protection. In the environment with high water temperature, the flower nail will spit sand on its own initiative, but be careful not to cook the flower nail if the temperature is too high.