All of us have WiFi routers at home. We have them to free us from the messy wires that are needed to connect to the internet. But sometimes, walls and other obstructions cause signal loss and result in lowered signal strength. This is an issue that all of us face at some time or the other. Here is an amazingly simple solution for it
Tear off some foil in the shape of a rectangle, give it a curve and then place the foil behind the antenna of your router. This will reflect the wireless signals into your preferred directions.
If the router is mounted on a wall, you can make holes in the Aluminium foil and insert it inside the antennas as shown in the following video.