Alright, so your camera lenses are dirty, and you don't know how to clean them? Here's a (not so quick) tutorial. Personally I'd think this sort of thing is fairly straightforward (blower to remove dust particles, as pure an alcohol solution as you can find, and a good microfibre cloth), but I guess for the uninitiated, a video helps.
Baka. Soku. Zan. - The justice behind the dysORDer.