Put half a bowl of large-grain salt (that is, coarse salt, available in supermarkets) and dirty plush toys into a plastic bag, tie the mouth, and shake it vigorously for several dozen times. When it was taken out, the salt had become gray-black due to the adsorption of dirt. Advantages: avoiding the toy plush knotting caused by washing with water, and the salt has a disinfecting effect, which is quick and time-saving. Principle: Utilizes the adsorption of the positive and negative ions of table salt, namely sodium chloride, on dirt. Infer other things: this method can also be used to clean the plush collar of cotton clothes and the plush cushions in the car.