1 soak in sesame oil for six or seven hours, the longer the better. If you use salt, it will affect the taste. Soak in clear water and add a few drops of vegetable oil. Just soak for three or four hours. 3 soak in water. Every hour or two, stir the water in the same direction with your hands, then take out the shells and add water again. This is almost three times. 4. Put two metal spoons into the water soaked in clams. These are all ways to make clams spit sand. These simple methods can be used to treat clams and sand in clams. If they are not cleaned, their taste will be affected. Therefore, clams must remove the sand inside before cooking.