1. Poor contact between the base and the heating plate leads to uneven heating and overheating at the bottom.

2. Poor contact between the base and the power supply leads to unstable current.

3. After long-term use, scale and stains will deposit on the bottom, which will affect the heating effect. In order to avoid this situation, pay attention to adding water when using, keep the bottom clean and ensure good contact. If it is found that the bottom is burnt, it should be stopped immediately for repair.