Don't take it off. Put the iron frame on the turntable. It doesn't need to be taken off except when scrubbing. The function of that turntable is to heat food evenly.

The reason why the turntable microwave oven has a turntable is because the microwave is emitted from right to left and will not rotate, that is to say, only people who come into contact with the microwave will generate heat, so the turntable rotates to achieve the purpose of uniform heating, but if the rotating speed is unstable or the turntable is uneven, the heat will be uneven.