Black lines along carpet edges are usually caused by filtration soiling. This happens when air moves through small gaps under baseboards, doors, or stairs and passes through the carpet. The carpet acts like a filter, trapping fine dust, soot, oils,…
Black lines along carpet edges are usually caused by filtration soiling. This happens when air moves through small gaps under baseboards, doors, or stairs and passes through the carpet. The carpet acts like a filter, trapping fine dust, soot, oils,…