2. After buying back the crayfish, you can prepare some clear water, then add a proper amount of salt to the clear water, and then put these crayfish in the clear water with salt for a period of time. Then it's time to clean crayfish. Generally, the abdomen of crayfish may be dirty. We can find a small brush to brush it a few times, and then cut off the head of crayfish, because the heavy metal content in the head of crayfish may be more. After removing the head of crayfish, we can find a pair of scissors to gently cut a hole in the tail of crayfish, which makes it easier to taste when cooking.

3. We need to clean the processed crayfish again, then drain the water, and then we can cook it in the pot. When cooking crayfish, the heat must be large and the cooking time must be long, preferably about 10 minute, because only in this way can some parasites and various algae in crayfish be completely killed.