Kev, well I guess it's our job to educate the public, but unfortunately I think many so called professionals are just not up to the job:
I went to a job this week, the home owner had originally contracted another (pro) cleaner in my area. His HWE machine packed in during the job, so he had to walk away without extracting. Well, I know this could happen to any of us... but you should have a back-up plan. But the real no-no was that he didn't even vacuum before pre-spraying!
FFS. He's been in this business a lot longer than me!