A popular online trick suggests placing a coin or a piece of aluminum on a Wi-Fi router might improve internet connection quality. However, technical experts disagree, explaining that metal objects can actually weaken the signal and cause the router to overheat. The idea is based on the belief that metal reflects waves, potentially redirecting the Wi-Fi signal and extending its range. However, there is no technical evidence supporting this theory, and specialists are clear in their rejection of the claim. According to some reports, placing a metal object on or against a router does not improve performance and may even make things worse. If some users claim they noticed better performance, it is likely due to a placebo effect or a coincidence, such as restarting the router at the same time they placed the metal object. In reality, improving Wi-Fi is not achieved by placing objects on the router, but by the router's location and its settings. The physics behind why this trick can be harmful is clear. The antennas on a router are precisely engineered circuits that emit signals on specific frequencies. When a conductive metal object is placed near them, it can disrupt their operation, a phenomenon known as antenna detuning. This causes part of the signal energy to be reflected back into the router instead of being sent out, which can reduce efficiency by more than 50%. Metal can also distort the signal pattern, creating uneven coverage and areas with poor reception. Additionally, placing objects on the router can block its ventilation, causing it to overheat and triggering a safety mechanism that limits performance or leads to long-term damage. The real solutions for improving Wi-Fi are both simple and effective. First, the router should be placed at a height of about 1.5 meters from the floor and in the center of the space. Placing it on the floor or in a cabinet can reduce its range by up to 30% and increase the risk of overheating. It should also be kept away from large metal objects, thick walls, and other signal disrupters like microwave ovens, cordless phones, or even aquariums, since water absorbs signals strongly. On the settings side, a few adjustments can make a big difference. Use the 5 GHz band for activities that require high speed, like streaming or video calls, and reserve the 2.4 GHz band for devices that are farther away, as it can penetrate walls better. A network analysis app can help find a less crowded Wi-Fi channel in your area. Connecting devices like computers or gaming consoles via Ethernet cables can also free up the wireless spectrum. Restarting the router regularly and keeping its software updated are also important. For larger spaces, using a repeater or a powerline kit can further improve coverage. These solutions are grounded in science, not in myths.