So I always thought that my PS3 blu ray lens was damaged so I couldn't play the dual layered type games. Repairing the console would cost $150 so I passed. Later, I got suspicious after purchasing COD mw 3 and it didn't seem to work so I tried vacuuming my console.
It worked, and now my FFXIII (a dual layered disc) works as well! :)
You're such a masternoob. If the front of your PS3 was that dusty it may also be a good idea to vacuum the rear as well.