Trouble streaming Netflix? The problem could be WiFi dead zones in your home. Maybe your house is a little too spacious, or the layout of your apartment just isn't conducive to a consistent signal.

Wi-Fi extenders work by rebroadcasting the internet signal, which increases its range throughout your home. For the best results, install the Wi-Fi extender between your router and any dead zones.

To anyone with a slow, spotty internet connection, WiFi range extenders sound like a bargain. You buy one for as little as $20, plug it into an outlet, and your problem is solved. Or so the marketing ...