With a Way Excellent, Way Excellent II or grungebuster turntable mat, the best way to clean the mat and keep it clean is to just dab the mat gently from time to time with a wide piece of masking tape. The mat can also be cleaned by gently wiping with a paper towel or cloth lightly moistened with distilled water, denatured alcohol, window cleaner or anti-static spray.
Steve Herbelin
Herbie's Audio Lab