If it is non-removable, disassembly is more troublesome, you can scrub it with a wet cloth and cleaning agent several times.
If you need to disassemble, first take down the small box containing water at the joint of the lid and the pot, then unscrew the screws, and remove the card from the small box. There is a small buckle at the screw, pull the small buckle down, and then twist the lid left and right with a little force to remove the lid. However, this method is easy to damage the rice cooker, and many rice cookers are now designed to be removable and easy to clean.