Use a stiff brush or cleaning pad on block walls or uneven surfaces.
From the chron.com
I wipe it down from time to time with a cleaning pad.
From the kansas.com
The Winbot has a damp cleaning pad on its leading edge that is followed by a squeegee and a drying pad in back.
From the gadgetwise.blogs.nytimes.com
The cleaning cloth has to be attached to the cleaning pad before cleaning and it has to be removed after it is done.
From the en.wikipedia.org
The cleaning pad has a built-in cleaner, which is activated by water and scrubs even stubborn dirt off your windows without leaving any streaks.
From the dailyherald.com
When the occupant opened the door, the officer saw a Gatorade bottle made into a smoking pipe, two small white rocks of an unknown substance, a lighter and a cleaning pad in the bathroom.
From the news-journalonline.com
Try a good deep cleaning with a coarse abrasive pad, Murphy Oil Soap and water.
From the sfgate.com
Dump stations often have running water for rinsing the RV's sanitary pipes and for cleaning up the dump station pad.
From the en.wikipedia.org
You have to wash and wring out the pad a few times if you are cleaning a large area of floor.