Yes that happened to me. I (painstakingly) took apart my hong kong model silver DS3 to fix it. I absentmindedly took the whole thing apart, but I figured out that all that is necessary is to take the back off. I replaced it with a little pen spring that I bent into shape, but it doesn't work quite as nicely, since the spring now has kinks in it from me bending it in a hurry. Know anywhere to buy tiny springs?