Auric Illuminator is 2 step tweak........first black opaque pen used to blacken inner/outer edges of CD, 2nd blue gel is applied to both sides and buffed off......the claimed total effect is improved read of CD data for various reasons, and thus improved sound, Galen Carol sells kit for $34..........Bedini II is subject of much debate, "clarifies" CD by spinning over electromagnetic field, creates polarization of CD surface which produces cleaner sound, $149 from Galen Carol.......I know, plastic and aluminum aren't magnetic, but I detect improvement and AI/Bedini II combo is even more effective together...... again not a miracle, but worthwhile and shows largest improvement on avg/poor recordings, more subtle on already good recordings, regards Sam