Cleaning the optics did not help. I did more investigation. It only starts to skip after it has played for 30-40 minutes. If I halt playing for some time, It will play fine the same tracks that were skipping. Also, if in the middle of playing a early track and I pause the playing, after a while the display says "no disc" and won't play until I eject and reinsert the disc. I think that the laser starts to falter once it has warmed up so I will need to get the player repaired. Hopefully replacement parts are available.