Many people believe that buying a high-end Wi-Fi repeater is sufficient to permanently solve dead zones in their home. However, this expensive solution does not always work, and some rooms remain stubbornly disconnected despite the investment. This is exactly what an internet user experienced until she tried an economical and unexpected maneuver. A simple gesture, carried out with an object that everyone already has in their kitchen, was enough to transform a room that was previously unreachable by Wi-Fi into a perfectly connected space. This raises questions about common beliefs regarding the propagation of waves and gives people an urge to test it at home before spending any money on additional equipment. To remember: a curved sheet of aluminum placed behind the router's antenna reflects the Wi-Fi waves toward the room to be covered. This trick does not strengthen the emission power but simply redirects the existing signal, its effectiveness depending on the layout of the house. In many homes, there is this cursed room where the Wi-Fi signal seems to disappear as soon as the threshold is crossed. A bedroom on the upper floor, an office at the end of the hallway, or an isolated laundry room: the load-bearing walls, the thickness of the partitions, or the distance from the router are often enough to create these dead zones. The internet user concerned had tried everything: moving the router, changing providers, investing in a powerline adapter. Nothing worked, the room remained completely disconnected for years. This is a problem that affects many households, especially in older homes with thick walls or multi-story houses, where waves struggle to move freely. It was while searching for DIY solutions on the internet that the idea emerged: placing a sheet of aluminum paper behind the router, slightly curved, like a small reflector. The principle is based on a well-known physical phenomenon: aluminum reflects electromagnetic waves. By positioning this sheet behind the Wi-Fi antenna, part of the signal that would normally go into the wall or in an unnecessary direction is redirected toward the area to be covered. Immediate result for this internet user: the Wi-Fi finally appeared in the concerned room, without any additional cables or expensive devices being necessary. This small gesture, almost trivial, was enough to concentrate the signal where it was most needed, like a mirror that directs light toward a dark corner. Before attempting, it is important to keep in mind that this trick does not strengthen the router's emission power, it simply redirects part of the existing signal. Therefore, the effectiveness will depend on the house layout, the router's position, and the distance to cover. Some precautions can optimize the chances of success: Place the aluminum sheet behind the antenna, without touching it directly; give it a slightly curved shape, like a miniature parabola; orient the curve toward the room to be covered; test different positions to find the most effective one. This method will not replace a real Wi-Fi repeater in very large areas, but it can make a noticeable difference in cases of weak coverage. A test with almost zero cost, which is well worth trying before considering more expensive solutions. Finally, this anecdote reminds us that the simplest solutions are sometimes the most effective, without necessarily going through the expense. Before rushing to buy new equipment, a detour to the kitchen and its roll of aluminum foil could well bring a pleasant surprise.