I have a tibook 800 with a combo drive and recently I have been having serious problems with my combo drive, When I insert a cd it mounts most of the time but sometimes it does'nt. Also I can't burn any cd's anymore (I always get a error) and watching a dvd is almost impossible now. So I was wondering is it alright to use a CD/DVD lens cleaning disk in a slot loading drive. and has anyone ever had first hand experience with this? Unfortunantly I don't have apple care anymore so I'm thinking this might be worth a try. Any suggestions would be greatly appreciated. Thanks in advance -Ram. BTW I'm sill running 10.2.8 if that makes any difference.