Pierre ,
I would be interested to know what you mean by saying" dont attempt this with out prper training" I am guessing you are reffering to saturation cleaning !
Most of my rugs i clean are cleaned in this way and the method has been demonstrated many times on sdo etc, its not difficult and virtualy fool proof,from your remark it makes it sound as if it is fraught with problems, please could you explain iyo what the pitfalls are, the only downside to this method is the drying times .
Geoff