It is normal for the surface of the heating plate of the Xiaomi Electric Pressure Cooker 4.8L to change color after using it for a while.
The electric heating plate is the main heating device of the pressure cooker. The aluminum alloy disc with an embedded electric heating tube can be seen after removing the inner pot. The electric heating plate will have circles of lines, which can increase the heat dissipation area of the electric heating plate, making the heat transfer of the electric heating plate more sufficient, uniform, and fast.
After the pressure cooker has been used for a while, the rice grains or water residues left at the bottom of the inner pot will form burnt yellow stains or carbonized black rice grains around the electric heating plate after heating. If not removed in time, the stains will become heavier and heavier. In severe cases, it will affect the normal heating of the pressure cooker and cause problems such as burnt rice. Therefore, it is recommended that you clean and maintain the heating plate regularly.