When your favorite music arrives on used DCC, most sellers do not even bother to rewind or look for that matter, unfortunately.
Sometimes it is understandable, if they do not have player.
There is a trick that I use when a tape arrives that needs rewinding. Do not put them straight in just any player. Preferably use a first Generation Player, like the 900/82/92/RSDC10/2000
These players will not move the head against the tape, when you attempt rewinding. All others actually first move the head on the tape, making it worse. If you do it with a first Generation player, the chance of the exposed spot not affecting playback is highly improved.
@syciu winds it manually by hand just a bit to avoid the head pressing. Also a great idea.