Why does the congee cooked the previous night in the Xiaomi Multifunctional Rice Cooker 1.5L tend to overflow when reheated the next day using the cooking function?

Question

Accepted Answer

When congee sits overnight, it tends to thicken due to absorption of liquid, increasing the density of saturated steam. This change accelerates the formation and rise of gas bubbles within the liquid, leading to potential overflow during reheating. To mitigate this issue, it's advisable to stir in a small amount of water before reheating. Selecting the congee function for reheating helps manage the density and consistency more effectively than using the warm rice function, which does not provide sufficient control over congee's thicker texture.
Additionally, adjusting the settings to reheat congee using the appropriate cooking function ensures smoother reheating and reduces the risk of overflow.