1. Prepare proper vinegar and salt, put them into clear water and mix well, then add lobster and soak for about 15 minutes. After soaking, the surface of crayfish can be cleaned, and the abdomen can be cleaned with an unwanted toothbrush.

2. Soak the bought lobster in salt water and vinegar for half an hour to eliminate parasites.

3. Brush the abdomen of crayfish with a small brush to remove the intestines.

4. The head of crayfish contains the most heavy metals and can be cut off.