Soap has magical qualities to it. Who can explain what it is and how it works? Much less how in some forms it is better suited to remove some as opposed to other parts of what it’s there to remove dependant upon formulation, yet how it also at times will leave more of a residue on the surface as opposed to others in how it works in general. It than also becoming part of the problem but a different form of it in part a solution but also in part a new problem to cope with. Use lots of examples in differences between one type and another from “Ivory” to some auto parts engine part cleaner machine to that which is used in a ultra-sound machine. It’s soap, and soap is a base, or it it always? What’s a base and how does it than both remove other bases as opposed to acids? Lead on with further info.