I was wondering if anyone has ever had a problem with their Underwood? Recently iv been noticing distortion when I play a little harder. At first I thought it was my amp or a bad cable but then I realized it was only happening with my upright. When I play my electric thought the same amp its totally fine. Do piezo pickups go bad? I think mine is really old as it was on the bass when I bought it and the previous owner hadn't played it in years. Any thoughts?