Laundry will always be one of those things that we wish Mom and Dad would still do for us. Still, we get used to it in college, and learn to do it only when we run out of underwear. But what about the other items – window screens, cars, dogs, and even the washing machine itself – that also need consistent cleaning? How are you supposed to know when it’s time to clean all that? Go take a look at this crash course from CNN – and don’t forget to wash your face.