Each summer, the humble banana carries invisible passengers home from the market — fruit fly eggs nestled in the texture of the peel, waiting for warmth to begin their quiet multiplication. A pest controller's offhand remedy, shared by one frustrated household and amplified across social media, has reminded many that the distance between infestation and prevention is often measured not in chemicals or cost, but in thirty seconds of running water. In the oldest tradition of practical wisdom, the most elegant solutions are the ones hiding in plain sight.