I went to my car today and noticed that the alarm is incredibly quiet. So quiet that I can only hear it when I'm standing beside my car and even then, it's barely audible (I think my doors unlocking is actually louder). I was out in the storm this afternoon, but I don't think that has anything to do with it, and I park indoors so I doubt that the brief exposure to shitty rain/hail has anything to do with it.
What do you think the problem could be?