Hand drying reduces spread of germs
Wet hands spread germs more easily than dry hands do. As a result, it's important to thoroughly dry your hands after washing.
Currently, it's unclear which method of hand drying is best. Whether you are using a paper towel or hand dryer, the key is to completely dry your hands. If you are at home, reusable towels are a practical option. Just be sure to change towels when they become visibly dirty.
However, avoid drying your hands on your clothes. If your clothing is dirty, it could contaminate your hands and lessen the benefits of hand washing.