 Drying laundry on a line in direct sunlight is known to reduce pathogens.Laundry detergents contain a mix of ingredients including surfactants, builders, optical brighteners, etc.Cleaning action arises primarily from the action of the surfactants and other ingredients, which are designed to maximise release and suspension of dirt and microbes into the wash liquid, together with enzymes and/or an activated oxygen-based bleach which digest and remove stains.