Disinfectent is a chemical used to destroy all microbes on a surface.
It is NOT used on the body as its far too strong.
A detergent is used to kill the microbes on a fabric
Hope that answers your...
it probably works by just guessing don't actually positivly know btw having a chemical in it that is a eater and eats all the germs away leaving the good fresh aparance that the surface is "clean"