Tips & Warnings. 1  If you are cleaning an indoor concrete slab, wet it down thoroughly with a mop and plain water, then scrub with scrub brush. 2  Mix up an all-purpose cleaning solution, scrub the concrete, then rinse with a mop and clean water.
How to Repair Potholes in Dirt and Gravel Driveways - How to . Most potholes in dirt or gravel driveways are caused by water trapped below the surface, so be sure to maintain or improve the quality of underground drainage.
Best Answer: Potholes are hollows formed underground by the action of water erosion. this usually occurs in porous limestone type rock where a fissure or crack allows the ingress of water from a river or stream to flow in.est Answer: Potholes are hollows formed underground by the action of water erosion. this usually occurs in porous limestone type rock where a fissure or crack allows the ingress of water from a river or stream to flow in.