Think about taking your car to a self serve car wash…
you spray it down with high pressure, hot soapy water, and rinse it off.
When you run your finger across the smooth, non porous paint job, it’s still filthy… you have to brush it!
We pre-vacuum to remove all loose soil, and then we scrub the carpet clean.
The debris that was stuck to the carpet has been wiped away by our pads.
* Over time, you can set your own chorus statement, but that is pretty much the analogy that I use.