My macbook pro 13'' 2010 model keeps spitting my discs out almost immediately. I don't think I have traveled with a CD in the drive before, so I don't know how it could be an issue. I would try to get a CD lens cleaner but I don't think my Mac will even accept it. I have tried different CDs, all are clean. The problem has been going on for awhile. A few days ago I upgraded to mountain lion and still no go.