2. When boiling the snail, first add clear water to the pot, and when the water is 80% hot, add the snail and cook for 15-20 minutes with medium fire. High temperature can kill the parasites in the snail. Before boiling snails, it is necessary to clean them, remove impurities such as silt and sand from their surfaces, and then soak them in salt water for 2-3 hours to spit out sand.