There is this thing that happens to me from time to time. I havn't had it for ages but now it is back. The hard skin on my slapping thumb gets a little black dod inside it. It isn't dirt (I don't think) because it is way inside there. When this happens, it can be painfull to play. Last time it happened I managed to dig it out but that made a big hole in my thumb. This time it is further in and I don't want to risk it. Anyone else get this?