Thank you guys but I can't imagine how the "tip" of the sensor can wear out, which tip are you talking about? There are only 2 plastic walls right and left next to a small metal piece, and with a small clip around the metal piece so that the sensor fits in, I can't imagine how the sensor itself would wear, isn't there a wire or a loop in the pad that actually wears out and that breaks the continuity of the circuit? Because otherwise I can't figure out how that works based on what I've seen
