Hello Tadgh,
I don't know who you are, but you sound like someone who sells microfiber.
I can assure anybody that if you develop "the technique", it is touch, a feel, when using a squeegee on corners and edges, you will not leave any moisture.
I had the contract for cleaning all mirrors , internal glass, escalator sides etc. for M & S, Debenhams etc there was no problem with the results.
As for commercials paying extra for great results, I would love to hear the extra they are paying and who is paying!!!