Other than cleaning LPs, I haven't tweaked software. But I did use some screen polish for my handheld PDA on a duplicate copy of Joni Mitchell's Blue this morning. First, I could see my reflection in the CD better, like a thin veil had been lifted from my face. Second, it did help the resolution of the music. I could hear the steel of Joni's guitar strings better, and there was more interior delicacy, more air to her voice. The latter is a significant Good Thing, in my book. I really don't want to sit around polishing CDs... but I guess it wouldn't be so bad. Hey, MikeG, I sure hope you also have a tweaky turntable and a collection of old vinyl to take advantage of that industriousness of yours. Cheers.