ok so when i put a umd in the drive it either tries to read it or it immediately says disc cannot be read. my question is what is the best way of cleaning the lens? do you use alcohol on a qtip or just a qtip because when i open up the door i can see little hair thing next to/on the lens. yah i know this has probably been asked a thousand times but ive searched and ive seen people say to use alcohol and not to. so what should i do? thanks for any help!