Every mother has experienced this. You have got a pot of water on the stove for rice or something else but get pulled out of the kitchen to deal with some kind of kid emergency. When you get back, the pot’s boiled over, making a huge mess all over your stovetop.
There is a very simple way to keep this from happening. It involves a little bit of physics. When water boils to create a foam, it makes the air-water interface area much larger. But it also makes it more fragile, so if the bubble is popped the whole thing collapses. Placing a wooden spoon across the top of the pot creates a simple interrupting barrier that will delay messes for some time.
Also try this tip: Chop Onions without Tears by Scientific Way
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