I did 350 sq m dirty office carpet tile in 3.5 hrs the other Sat with a gofer who had not done any ccing before. He vacced & sprayed. I knew he would not spray little enough so I mixed the spray 30-1 and let him overspray.-worked a treat. Customer rang on Monday to say that they were very pleased.
The secret, I find, is to have a big enough plain water container to let the pad lay flat while soaking. Wring out well, redunk and wring again. The pad should have enough water in it to squelch if it is on the floor and you put your foot on it but not enough to drip when held vertically. If the carpet is really dirty I dunk the second time in No2 or 9 at about 15-1.
I got home walking normally and took the dogs for a walk instead of collapsing as after HWE.
You do need two pads to allow them to soak well, this is when the dirt comes out. We change the soak water every 50-60 mts depending on the muck- It is amazing how much comes out, unlike some others i know.
Trevor