1. First, make sure the rice cooker is connected to the power supply and set the cooking program.

Secondly, find the insulation switch on the rice cooker after cooking. This will be a separate button or knob to control the insulation function.

3. Finally, switch the insulation switch to the on position. The insulation switch on some rice cookers has different gear or temperature choices, so you can choose the appropriate gear according to your needs.