1. First loosen the screw at the bottom of the handle of the hot water kettle with a screwdriver.

2. After loosening the screws, loosen the side screws clockwise.

3. There is a screw at the joint between the handle and the lid, which needs to be loosened.

4. After that, you can remove the handle cover and see the temperature control switch. Tighten the screw on the temperature control switch with a screwdriver to fix the temperature control switch.