When cleaning the lens, first put in a cd in cd position 1,
choose a long disk with say 20 tracks on, play it on the last track so the lens travels to the end of the sled , then power off whilst playing,
this will help you reach and clean the lens without bending the clamper, a little trick i found along the way.
Dont clean it with anything other than isopropynol on a cotton bud (q-tip)
but before you do clean anything, play the movie theme from the 'exorcist', turn the volume up and rapidly turn your ceiling lights on and off, just for fun.