The newly purchased casserole needs to be treated as follows before use:
Put the newly purchased casserole directly into clean water and soak it for about 3-4 hours to allow the casserole to absorb enough of moisture. Then use the soaked casserole to cook the rice porridge until it becomes a paste. Then stop the fire and let the rice porridge sit and cool naturally. When it is completely cool, pour the rice porridge away. Finally, rinse the casserole with clean water. That’s it.