The primary mechanism of soap and detergent action in water is the formation of micelles. In these structures, the hydrophobic tails of the molecules turn inward, while the hydrophilic heads face outward. This arrangement allows the encapsulation and removal of grease and oil. There's a common misconception that detergents become less effective in hard water, unlike soaps, which can form 'soap scum' precipitates, reducing their effectiveness. In reality, detergents are formulated to work efficiently in both soft and hard water without forming precipitates. This is due to their chemical structure, which prevents interaction with hard water minerals, making synthetic detergents effective in various water types for cleaning tasks.