What is the term for soil that gets pulled to the tips of carpet yarns during drying?

The correct term for soil that gets pulled to the tips of carpet yarns during the drying process is wicking. This phenomenon occurs when moisture containing dirt or soil travels upward through the carpet fibers as they dry. The capillary action involved in wicking can cause the soil to be drawn from deeper within the carpet to the surface, creating a visible mark or line of dirt at the tips of the fibers.

Understanding wicking is crucial for carpet cleaning professionals because it highlights the importance of proper drying methods and techniques. If carpets are not dried quickly and thoroughly, wicking can lead to re-soiling and unsightly stains that may require additional cleaning. This knowledge helps technicians apply the appropriate cleaning and drying methods to prevent the occurrence of wicking and maintain the carpet's appearance.