I use the MD lens cleaner (dry dummy disc with a couple of audio test tracks,) every four months. I would not recommend using a cleaner unless there is a noticeable problem - failure to find tracks or erratic skipping. I use it once and a while only because I notice a visible lint build-up inside the unit, not because of any mechanical problems, which means I am probably using it too much. - - - AquaLangs ----------------------------------------------------------------- To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]