care of a TGP stoneware mortar and pestle

Handmade stoneware mortar and pestle sets need very little care, and can be washed by hand or in the dishwasher. I suggest grinding a little bit of cheap, white rice to make sure the interior surface of the mortar, and the blunt end of the pestle are smooth. Grind all over the un-glazed interior surface, then rinse away any residue, then do it again. Cooks Illustrated Magazine suggests this technique.