First prepare half a basin of water and an old toothbrush. Put in the crabs to be cleaned, don't worry about the crabs running around, they will get into the water. Some crabs will run out, just catch them or drive them into the water, and they will be quiet for a while. It can be cleaned after soaking for about ten minutes. Grasp the sides of the crab and use a toothbrush to vigorously clean the back, belly and mouth.

Then clean the sides of the crab and the base of its feet and claws. This is the most critical step, and it’s not for the faint of heart. Grasp the pair of pliers (use the handle of a toothbrush to lift the joints of the pair of pliers from bottom to top, and use the thumb and index finger of the crab to grab the crab claws upward along the base of the claws. For some fierce crabs, you can first press down on the claws a few times or Beat it a few times) open the abdominal cover and squeeze out the excrement from the inside out.