Magic wipe, also known as nano sponge, is based on the principle of pure physical decontamination. It relies on the nano-level capillary opening structure in the sponge to automatically absorb the stains on the surface of the object during the wiping process. Like countless ultra-micro vacuum cleaners at work, only clean water is needed. Does not rely on any chemical detergents to help degradation. Simply put, the magic wipe is to use the attractive effect of the liquid surface on the solid surface, that is, the capillary effect to achieve physical decontamination.