Hi, Yes in some offices it was, many said they would file it away, well I went in & suggested they might like to keep my details on file as I was sure the cleaners they were using were very good already, however, as they were probably good they would have very busy times and them the LA could use my service instead for a couple of jobs, then went on to explain how I paid attention to detail etc etc, all up to inventory standard, pointed out places where many cleaners miss - mainly under the kitchen wall units.
That way by not trying to say you are better and insult their cleaners who they may like, the LA are more likely to use you. Some were keen straight away and booked me within a couple of days, but I am very smiley & chatty when I go in, work on the theory that if they like you they will give you a try out anyway.
Hope it helps, I now need to do some more......