CD car player needs cd inserted numerous times?

my car cd player will play one of my cd's, but no others. All are rejected with error notations. The one that works is just fine and works every time. I tried the brush cleaner disk but it also is rejected. The one cd that plays every time may possibly be one hair thicker than the others, but it's hard to really tell. Is there some way to clean this thing without tearing it out.