Response Strategy 1: Mix a certain amount of salt with water (high concentration) and stir evenly, use cotton pads to dip the saline and gently wipe on the face. After a few minutes, when the water on the face has evaporated and left a white powder-like residue, rinse it off with clean water. This method can not only thoroughly clean the dirt hidden in the pores but also remove the aged stratum corneum, thus restoring the luster of the face. Sensitive skin should be used with caution. >> Dull skin meets four major remedies.