1. Just take it home and throw it in a basin, then pour some water. Add a few spoons of salt into it, stir it, and soak it in lightly salted water for about an hour. The purpose of this step is to let it spit out the dirty things in the stomach. You'll need to change the water a few times while soaking. When the water slowly becomes clear, the dirt is almost spit out.

2. Start brushing. Use a slightly stiffer toothbrush so you can clean it. We dip it in the water first and then clean the crab's back, belly, mouth and sides. Then brush its pincers and six legs.

3. Be sure to control his pincers tightly with your hands so that you don't pinch yourself. We'll open his lid again and squeeze out a black part of his body, which is his feces, and brush the dirt out of it.

4. The crab's gills must be removed. It grows on the crab's abdomen. It looks like eyebrows and is two rows of soft furry substance. There are a lot of germs in it, which is harmful to human body if you eat it, so it must be cleaned up, and then we brush it carefully again.

5. See if there are any black or muddy things in his stomach. After all cleaned, it can be put aside.