Good Product or Nonsense?

All my CD's wear Rain Tinge or they wear nothing at all.

DeKay

Two products not to use:
Optrix- it does  cause many CD's not to be readable months later.

Essence of Music does  scratch up the CD's.
David Pritchard

If Optrix does that those CDs are junk and not made properly. I treated various discs and they play as they did twenty years ago. Same cd player, by the way.

Has anybody tried LAST for CDs?
https://thelastfactory.com/product/last-cd-dvd-cleaner-treatment/

Auric Illuminator seems to offer more benefits for SQ improvement than other formulas; more focused and less reflections from the laser.

Is this why both sides of the disc need to be coated?

As I remember, Auric was quite popular among Audiogon members some time ago. I just never got there to try it because cds are not that important to me. I think, most or all who compared said that it was better than Optrics. Some preferred Walker, though, if memory serves.