OCModShop posted a guide about how to clean your CD and DVD Drives
When your CD or DVD (disc) drive starts giving you problems, your first thought may be to replace it or take it to the repair shop, but a good cleaning may be all it needs.How to clean your DVD drive
Below are three methods to clean the disc drive. The easiest method is the least effective. The hardest method is the most effective. Since the hardest method takes some time to do, I recommend that you start with the easiest method. If it solves your problems, congratulations. If not, try the next method.