PS3 BluRay Drive is broken.

[Mikeanheath]

If your drive still works after you run a cleaning disc, I would take a  look at this site.

http://www.ps3news.com/forums/ps3-guides-tutorials/how-replace-playstation-3-blu-ray-drive-laser-lens-100237.html

He shows how to open up your drive and replace the lense. Maybe you can just open it up and clean the lense? Worth a shot if you were gonna replace your drive anyway.