OK - Wysy
No lie, the straight-dope..no fooling...this is the straight dope.
1. Soak a soft (old, soft, 100% COTTEN t-shirt/diaper/sock) with PREMIUM (no sugars added) VODKA (grey goose etc) ....(unfortuately Rubbing/Isopropal gives a haze)
2. Gently rub the disk and wipe with soft cotten dry cloth.
GUNK - should be removed-
If GUNK came from adhesive stickers - wipe with olive-oil.
Repeat - Vodka treatment
3. If scratches remaine - rub entire disk surface, in a gentle circular direction for a couple of minutes, with a regular, over-the-counter, toothpaste.
4. Clean again with vodka.
5. Set aside for a day