One of the most frustrating things about having Wi-Fi in your house is that the signal strength can never be trusted. Sit on the couch and it's super fast...but take two steps to the left? Somehow, you've entered a dead zone. Even if you have the most high-end router, chances are, there are some spotty places in your home. <br /> <br />Thanks to this little trick, though, you'll never have to deal with that annoyance again. All you need are a few soda cans...