I recently made my first mug in a slab building class and got it all the way through glazing. But when I got it home and used it with a warm liquid for the first time, it makes a ‘pinging’ noise periodically. What does this mean? Is it going to eventually crack? I hand washed it before using it in mildly warm water.
It’s made from the class white stoneware and glazed with some of the DMS glazes.