I pressed the horn pad on the right hand side when the steering wheel is straight. Once I had turned to one side (curvy hilly roads in western ghats) because of which other side of the horn pad was under right hand. It did not work. Then I realized it is probably rusting/oxidation of the contact points on left side of the pad. Then I made it a point to press the left side also whenever I pressed on the right side. Within a week left side also started working It looks like the case of "you lose what you don't use". So use it regularly to keep it in good condition.