1. After buying it, put the screws into clean water and change the water twice a day. This method does not require any external force, and then the screws will slowly spit out sand by themselves. The disadvantage is that it takes a long time.

2. Soak in clean water, but put a few rusty screws in the water, shake it gently a few times, and the snails will spit out the sand in about half a day. The snails are very sensitive to this kind of rust. The iron stuff is very sensitive and spits out sand very quickly. This method takes half a day and saves a lot of time. The disadvantage is that you need to find rusty tools.

3. If you are in a hurry to eat, we need to cut off the pointed tail of the snail first, then cover it with two permeable baskets, shake it vigorously, shake it for two minutes and rinse it with clean water, up to 10 minutes. All the sand and mud in the snails will be clean.

4. Put the snails into the bucket, add water and stir. Stir vigorously to spit out the sediment as much as possible. Then change the water to a basin, add chili powder and a little vinegar, and stir evenly. , soak for three hours. Pick away the floating snails, because the floating snails are dead, then clean the remaining snails with clean water, and then blanch them in a pot.