2, such as dried clams are soaked to soften, you can start to clean up the sand in its body. The black part of the dried clams is the sandbag, the clams inhale the sand in the body are present, you can choose to pick it off directly and throw it away, and then scrub the dried clams a few times will be very clean.
3, the sandbags of the clams themselves are edible, if you do not want to waste to keep the sandbags. However, if you leave the sandbags, you have to cut a hole in the sandbags and scrub them a few more times to get them clean.