OK just to back up a bit... it was late and I was a bit too tired to make a full reply.
We see many many posts in this forum from window cleaners who fancy having a go at carpet cleaning. Unfortunately many seem reluctant to accept that you need to get a good level of training under your belt before you start working on thousands of pounds worth of soft furnishings!
Windows don't shrink if you get them too wet, nor do the colours run. Windows are generally all made of glass, rather than a range of different materials that react differently from each other. Yes there is a more advanced side to window cleaning, i.e. wfp pole 6 storeys high etc but you're still washing a piece of glass with water; the pitfalls are generally health & safety issues rather than product liability issues that can and do bite the inexperienced on the bum when they undertake carpet & upholstery cleaning.
Mike's question, asked in that way, (and i'm not being derogatory here) shows that there's a bit of a knowledge gap that needs filling.
So excuse me if my reply was a bit blunt.
All that ANY carpet cleaning machine does is squirt and suck, it's down to the guy on the end of it to get the best out of it. That's my point. Getting the best out of it has little to do with the machine, as long as you connect the pipes up the right way round it's mostly down to knowing what you're doing with it, which comes from getting trained and qualified.
