Hard water leaves an insoluble soap-curd film on you, causing your hair and skin to “squeak”. Most of us grew up with hard water, so “squeaky clean” was all we knew and what we grew to expect from our bathing and shampooing. No wonder we all believed that we were our cleanest when our skin and hair squeaked. Soft water leaves your skin and hair “hydrated and clean”, not squeaky. Since water is wet and there is not scummy film on your skin to cause friction, the water feels “slippery”. That slippery feeling is the indication of healthy, clean skin and hair.