I have a very flaky cdrom/rw drive which hangs up when burning discs, usually at the lead-in/lead-out stage. It has become progressively worse over the last year or so, to the extent that I have now replaced it. However, before consigning it to the bin I would like to find out what's wrong with it. Does anyone know of a good diagnostics programme that I could download? Also, do laser lens cleaners really work?