Having ruined CD's years ago following Sam Telligs suggestion to use Armor All, I'd decided to forget using anything petroleum based on my discs.
A friend dropped by with his latest discovered tweak, Shine Ola. He told me it was safe to use, was alcohol and oil free and wouldn't etch my discs, so I decided to give it a try. I cleaned a CD as he sat on the listening couch just smiling. Wow! I had to rush over and turn down the volume of the preamp. I'm not sure if Shine Ola is improving the dynamics that much or if it is just making the disc easier to read, but it is a noticeable increase in volume. Did anyone else notice this?
Anyway, Shine Ola really improves the sound of any disc, CD's, or SACD's. It even works on DVD's at home. Instead of returning to the rental outfit with unplayable DVD's, I can now clean them and watch the movie. Highly recommended.