[steve84]

Sorry for the delay in responding. I took the horn pad off today and closely examined it. For each of the three contact points, there was a chunk of plastic missing from the cylinder within the spring. I replaced the horn pad by pressing it on as much as possible, and seemed like a tight fit. I went out for a short drive , and a car was starting to turn into my lane while driver was looking at traffic coming from opposite direction. I forcibly hit horn to get driver's attention and horn pad separated. I guess I have to start looking for a replacement horn pad. Thanks for your suggestions though.