I Appreciate what you are saying, but one dab on a cloth will clean a large conservatory sill, and you dont need to press on or rub hard, hence cleaning the dirt only,
and its great for scratches, ..done my own con for 3 years and its gleaming new and shiny.
i sometimes wet the whole frames first , then add t.cut.... makes it easier and still gleams.
each to their own though, only trying to help.