Most carpeted areas need this vacuuming once a week, with several slow strokes. Dry soil from shoes, crumbs, etc. These methods will also remove dust from the carpet surface. Pet hairs should be removed promptly, as the oil in them makes them cling to carpet, and work its way down into the pile. Gritty soil tracked on carpet by shoes, wet or dry, will sink down in between fibers of carpet.
Gritty soil has very sharp edges capable of cutting carpet yarn fibers.
Vacuuming is the best means of removing the grit from deep in between the carpet fibers. Upright vacuum cleaners generally do the best job of removing deep-seated gritty soil from carpets. Next are combination canisters with power-driven rug nozzle. Steps can be vacuumed with the upholstery nozzle or brush attachment. Room size oriental rugs are best cleaned with an agitator type cleaner.