How to prevent the pot from overflowing effectively and how to prevent the pot from overflowing when cooking soup



When cooking porridge at home, accidentally the porridge overflowed, making the stove dirty, especially in the small cracks. Is there any way not to overflow when cooking porridge? 
Life tips will introduce you to a few ways. 
1. The method we all see at home is to put a spoon on the edge of the pot cover, so that there is a gap between the pot cover and the edge, so that hot air can flow out, so that it is not easy to overflow when cooking porridge. 
2. Drop a few drops of salad oil, sesame oil, and other oily items in the pot, and then boil it over medium and medium heat. 
The principle is that the surface tension of a viscous liquid must be very large, and the water must boil when heated, turning into tiny water vapor bubbles running out of bean soup, this layer of sticky starch film is not easy to break, so water vapor bubbles gather more and more, stick together with each other, and become a bubble heap, water vapor continues to accumulate higher and higher, and when they accumulate beyond the edge of the pot cover, it overflows. 
Add some oil, because the steam bubbles running out of boiling water are not covered with mucous membrane and cannot accumulate, so no matter how many times the water boils, it will only boil less and less and will never spill over to the outside of the kettle. 
3. The solution to the spillover of porridge cooked in an electric rice cooker is to wash and soak the rice two or three hours in advance, and then cook porridge, which can be avoided. 
4. When cooking porridge with hot water, the procedure of boiling rice with hot water (when the pot is half boiled, the water temperature is 50 to 60 ℃) is adopted, and the overflow of rice soup is very rare.