I just treated 5 discs this evening with no scratches. When I wipe, I use one side of the cloth to pick up most of the liquid, then the other side to dry the disc. I don't use much pressure, just light pressure under strong light so I can watch as the liquid is absorbed and the disc gets polished.
I did notice in the past I could scratch a disc easily by using too much pressure or by using a crease, or fold in the cloth.
I did notice in the past I could scratch a disc easily by using too much pressure or by using a crease, or fold in the cloth.