Forget those. Any decent brand of lens wipe, such as those by Zeiss found at Walmart optical departments are easily better than anything else. First, the lens wipes by Zeiss are specifically made for optical grade polycarbonate lenses, which is exactly what cd, dvd, sacd and blue ray discs are made of. Second, the lens wipes are made of a material that will not scratch the polycarbonate surface of the disc. Just don't use it on the printed side of the disc. And always use a freshly opened wipe and don't share between discs.