When the inner drum is rotating, I imagine with all that heat in about five years it would produce a "dryer coin." During those five years, the machine would make an occasional rattle sound. Or...When the inner drum is rotating and a coin falls out (that's where this process must start if by accident) due to centrifugal forces, the coin will be on a non-moving part of the dryer. The only way an edge could get turned up is if the space between the moving drum and the outer wall is so close together that the edges of a cent are constantly abraded. Anything thicker than a cent would make noise or not fit. A dime should just lay there unaffected! I've never seen a "dryer dime" yet they must be very common. I've never seen a "dryer quarter, nickel, or half a dollar" either. So only cents occur in a 100 (?) to one ratio? Additionally, I can see no reason to spoon that many cents unless they were done as a step to make "coin art" or to fake a mint error. BTW, most of these dryer cents have edges that look just like the upturned, machine-made (not washing machine-made) encased cents. Interesting.