Flag question?????

We have a new flag to fly at our house. Since we fly it 24-7 ours had gotten pretty tattered and was tearing and every windy day this summer was making it worse. So it's now retired and a new one is flying. The new one came with a nice little pamphlet about flag etiquette and all kinds of information but it doesn't say what to do with the old one. Anyone know the rules????