Washing dishes in cold water without soap can be somewhat effective for removing visible dirt and debris. However, it may not be sufficient for thorough cleaning and sanitization. Here's why:
Grease and oil: Cold water alone may not be able to effectively remove grease and oil from dishes. Hot water helps to break down fats and oils, making them easier to remove. Soap also aids in emulsifying and lifting away grease.
Bacteria and germs: While water alone can physically remove some bacteria and germs, using hot water and soap is much more effective at killing and removing them. Soap helps to break down the cell membranes of bacteria and viruses, making them less likely to survive on the surface of dishes.
Food residue: Soap helps to break down and remove food residue more effectively than water alone. It can dissolve and lift away stuck-on food particles, ensuring cleaner dishes.
Odor removal: Soap is also useful for neutralizing odors that may linger on dishes, especially from pungent or strongly flavored foods.
In summary, while washing dishes in cold water without soap may remove some visible dirt, it may not provide thorough cleaning and sanitization. It is generally recommended to use hot water and dish soap to ensure proper hygiene and cleanliness.