Anyone use CD tweaks

Yea. Give Herbie's Black Hole CD mat a try. It is meant be adhered to a disc permanently. It stabilizes the rapidly spinning disk in the drawer and damps the inherent resonance within the disc as it is being played. The music is more coherent across the frequency spectrum. I bought two 200 mat lots of these little beauties. Highly recommended!

Opaque blue marker pen twice around the outside and the inside hole of the CD.

The color of marker that's most effective depends on the color of the CD label artwork. For example, Mercury Living Presence CDs (labels are Black and White) prefer Red marker on the outer edge and black on the inner edge. Most CDs prefer Green or Purple (Violet) on the outer edge and Black on the inner edge.

I'm only digital, and only CD's, so I thought maybe it was time to treat the discs since I had pretty much tweaked everything else in my rig. I can tell you, flat out, that the Mikrosmooth / Optrix spray combo from Mapleshade is crazy good -- better air, clarity, staging, freq extension, everything. It was like a good cable upgrade. IOW, significant. And I am definitely a pessimist when it comes to this kind of stuff. I even considered contributing a testimonial to Mapleshade, but I suppose I just did...

30 day MBG. Easily worth the $40 + shipping IMO.

mikro/optrix

I use a Hammond bulk tape eraser and demag all my cd, dvds.

I also run my CD player on it's own 20 amp dedicated line,into a Hydra 2 and I use a Shunyata Annaconda Helix power cord.

The sound is much better this way , it rivals my lp set up.

The cd player is an Audio Aero Capitole 24/192.