I totally agree with clean and dry BUT as someone who works alone, from start to finish, i think even amongst the best of cleaners the standard will reach a level where some people feel that the cleaning is not that good any more.
I am sure that a lot of it is simply because the client gets used to the service (how many times have i bought a brand new vacuum or steam iron and thought how wonderful it was, only to quickly get used to its performance and allow myself to be fooled into thinking it was not that good any more).
With cleaning i think that because (as a ball park figure) 90% of the work is clearing up the sh#t from that day or week and returning the place to some sort of normality, it is difficult for others to know what has been done and to move a piece of furniture or the like and think "blimey, no one cleans round here, they must be a crap bunch of cleaners".
That said, i have seen some pretty lousy cleaning in peoples homes where they have been using cleaners before me. I think there must be a lot of reasons for poor performance. In domestic cleaning i know that the financial rewards are poor unless you work for yourself...
Stephen