Remove dirt from walls

The marks whether from crayons or pencils can be removed using cotton with a dab of toothpaste on it. Dirty marks left by hands can be wiped off by a wad of bread or worn woolen socks, erasers, and sandpaper. If these methods all fail, apply to the spots of dirt watercolors or water-based paint that has the same color as the wall so that they will not be so obvious.