Don't open this again, because you can't disassemble and wash it yourself. If you want to know how to open it, I can tell you, but I'm afraid you can't put it back. If you insist on dismantling, aim the rice spoon at the small crack on the edge and press it down hard. You will find that the rice spoon will be inserted a little, and then carefully stretch the circle and cut your hand.

I advise you not to open it, because there is nothing in it. Generally, the aluminum plate is fixed on the inner cover with small screws, and there is a positioning device for installing the opening and closing buckle plate. There may or may not be an electric heating wire on the aluminum plate, and then there is a cover opening handle. I found that the cover has no sealing ring, which is probably broken. I suggest you go to the repair shop to have it repaired or buy a new one. Wish you a happy life!