Buy a bag of big salt, that is, coarse salt, put the coarse salt and dirty plush toys together in a larger plastic bag, then tie the bag tightly and shake it vigorously, and you will definitely find that the plush toys are clean. The crude salt taken out turned gray-black due to the adsorption of dirt. The principle is to use the adsorption of salt, that is, sodium chloride, to dirt. You can also use baking soda instead of coarse salt, and the usage is the same. This method is more suitable for large plush toys that can make sound and cannot be washed.