Interesting comments all round and we probably, all, have loads of stories of sorting other peoples mess.
I love it when quoting, after, not just C D, or R B, but anyone who claims to be , super powerful, or whatever and more often yhan not.......knocking everyone elses system.
My approach has always been, to say that there are a number of ways to clean, with some giving better results than others..............but, the main criteria, is..........the product being used, the correct use of the product and the skilll /application of the operator.
You don't need to knock anyone else to justifya good value and ethical service, in fact it's one of the cardinal sims in business, Never mention negatives[/
rob m