I can honestly say i have not had a customer call me back in the 4 yrs i have been operating with regard to a bad clean , i have had 1 call back from one of my first jobs saying that the carpet was really badly buckled the day after ,turned out to be their fault for lifting 20ft down one side off the grip rail to put speaker wires back and not putting it back on the gripper.My mate was a carpet fitter so put it right for her and also charged her..I have been back to 1 job the day after to a really fussy customer as i made a small mark on her 1970`s vinyl tiled floor with the wheels of my tennant hoover , it took me 2 seconds to get it off with a green pad.. oh and i cleaned a white woolen rug on thursday prior to cleaning a lounge hall and dining room by the time i was nearly done the muck had wicked back up , it was a fireside rug..And yes that other post was a bit harsh new user also , take it easy geez ! we are all in this together after all the very fact that i am looking for new ways to improve what i do should speak volumes,,And yes re speling professional wrong didn`t wanna pick up on that as i know my spelling and punctuation is at the best of times a bit crap.. i am going to call prochem in the morning and get the info from them