Been using Optrix for years on my DVD/Blue Ray rentals bc they are filthy and these business's use some kind of Meyer product on them after kids with peanut butter and chocolate have been handling them. Really not to concerned about the 'sonic improvements' but if you don't like pixellating videos, this stuff is a must!
On another subject I also use 'ECO 3' by Nordost on the label side of my rental disks.
On another subject I also use 'ECO 3' by Nordost on the label side of my rental disks.