DVD Laser Lense Cleaner
This product is also helpful in calibrating video/audio quality, too. In comparisson with other product on the market at the present time, this DVD disk cleaner is the best. It includes calibration for several version of audio set up two channel stero, 2.1, 5.1 Dolby, and even more versions with seperate subwoofer, etc. You can listen to audio samples of pop, jazz, and classical music in several versions of audio set up. The other DVD disks on the market I came across, so far do not have these samples.
I will recommend this DVD laser lens cleaner at any time.