Filtration soiling is a term used to describe dark, grayish lines that may appear on carpets. This is not a carpet defect, but a situation in which dust, smog, and other airborne pollutants can accumulate on the carpet face fibers in areas with a concentrated flow of air over the carpet or through tiny cracks or other open areas under the carpet. The soiling condition can occur quickly or it may develop over a period of months or years. The level of soiling is dependent upon the volume of air flow and the level of pollutants in the air. Filtration soiling is not dependent on the quality of carpets selected. The condition will obviously appear more pronounced on lighter colorations than darker color tones. Filtration soiling areas may appear around baseboards, under doors, along the edges of stairs and possibly away from walls where plywood sub floorings materials have been joined. While no one cleaning technique may be successful in all filtration soiling situations, recent innovation in soil and stain resist treatments applied to carpets have reduced the effort previously needed to remove the filtration soil. However, the complete removal of contaminants from the soiled areas can be complicated depending on the type of contaminant materials present. Therefore Choice Care Carpet Care should be considered to achieve the best results. Guidelines for the cleaning are available with us too. For service & all your rug cleaning needs, feel free to call us @ 912-354-3067 in Savannah Ga. Cleaning local carpets for over twenty years!