1.   If the carpet is really dirty, try loosening the dirt with a dry scrub brush and vacuum again.

2.   Soak them in a sink full of cold water, swoosh them around to loosen any dirt, remove with a slotted spoon and drain well in a colander.

3.   Sometimes you only need water to loosen the dirt.

4.   That dirt seemingly was loosened by a struggle between Goldman and the murderer.

5.   The particles interact with ultraviolet rays in sunlight, loosen dirt and, then, with water, distribute the dirt evenly across the surface.

6.   Then brush the surface with a broom to loosen dirt that may be hiding grooves between pebbles and rinse thoroughly with the hose.

7.   With a directional bore, a long rod goes into the ground, shooting water to loosen the dirt.