Your mother-in-law is coming over in a few days, and you’re worried she’ll notice all the areas of your house that aren’t clean. As you check each room, you notice that the walls seem a little dingy, but you don’t have time to think about repainting. How long has it been since the dirty walls were last cleaned? It doesn’t matter—you’re cleaning them now, but how? Here are necessary steps to properly and safely clean the walls so that they look sparkly and new.