My dad and I are having a debate about the importance of using washing up liquid and I need your help!!
He proffers that water in itself is clean, so why can we not just use water to clean our plates etc.
He also gave an example of how we would likely feel cleaner after “trudging through the jungle”, if we had a wash in a big jungle waterfall without soap.
I showed him that his glasses come out looking cleaner (no water marks) when he washes them with washing up liquid to prove my point that it is important to use it.
But can anyone tell me the actual science behind why we should use it? Or is my dad right? 😂
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Rub some butter on a Tupperware container and tell him to try to clean it with just cold water. It will continue to feel greasy no matter what you do. You might be able to get it clean eventually with extremely high temperature water, but using detergent will make it stop feeling greasy a lot faster.
It’s easiest to demonstrate this with plastic because it holds onto grease, but really this applies to anything. Detergents break grease up into tiny little droplets, stop those droplets from merging together, and suspend them in the water so they can be washed away. The majority of food residue that won’t just rinse off in water is greasy. Dish liquid often has other ingredients besides just detergents that can help with messes other than grease, but really it is mostly just the grease-cutting that is doing the heavy lifting.
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