posted on March 18, 2001 07:25:08 AM
You get the stuff used for bleaching hair, fill the dish with it, and place in a warm oven for a while (or seal in a BLACK plastic bag and place in the sun).
Rinse and repeat ad the gunk oozes out of the crazing. Practice on a junk dish.
Rinse thoroughly.
NEVER use laundry bleach ... it chemically reacts with clay and will make the glaze pop off.