A technology professor suggests placing aluminum foil behind your router to boost Wi-Fi speed. “Like a sprinkler head spraying water in all directions,” explains James McQuiggan, signals weaken where they’re needed. The foil reflects and directs the signal, improving strength. A Dartmouth study confirmed this, increasing signal strength by 50% in key areas. It can also enhance security by limiting signal reach. Results vary—one user found “one sheet didn’t make any difference at all.” Still, it’s a simple, low-cost trick to try before buying a Wi-Fi extender. Other metal items like baking sheets or cans may also work.
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