1, water quality problem: impurities and chlorine in water may precipitate at the bottom of the pot after heating, forming yellow spots.

2. Boiler problem: If the boiler design in the boiler is unreasonable, the temperature at the bottom of the boiler is too high during the heating process, which will easily lead to local scaling and yellow spots.

3. Usage problem: If it is used improperly, such as excessive detergent or improper cleaning method, it may damage the coating in the pot and lead to yellow spots.

If yellow spots appear in the incubator, it is recommended that you try the following cleaning methods:

1. Cleaning with acid substances such as vinegar or lemon juice can soften and remove the scale at the bottom of the pot.

2. Use a special pot bottom cleaner for cleaning, and follow the instructions.

3. Always keep the health pot dry and clean to avoid storing unwashed water for a long time and prevent scale accumulation.