Make 2 3 passes along the skirting boards with your scrub brush.
Dirt around edge of carpet.
Dark dirt marks around the edges of your carpet are caused by an issue called filtration soiling.
Along the edge of walls where the carpet meets the wall.
You can also use a dampened white rag to scrub your carpet edges.
You can find evidence of filtration soiling anywhere airflow is restricted near carpeting.
Start with the hvac system.
This will help release any trapped dirt dust or debris.
Filtration soiling occurs when there is an imbalance in the air ventilation of the room.
Filtration soiling is pollution that comes from dirty ductwork and settles on your carpet.
This soiling is called filtration soiling because it comes from air passing through the carpet as it is attempting to get through the crack between the.
Along the lines of floorboards under carpet only in extreme cases.
According to procare the premium carpet upholstery care specialists.
Preventing filtration lines filtration soil around the edges of the room is a fact of life in most homes with central air systems but you can minimize it by cleaning your furnace air filters regularly or replacing them when they are dirty.
You may need to use detergent for more persistent stains.
To clean up these stains you need water and vigorous scrubbing.
The black lines are a result of filtration soil.
The carpet acts as a filter gathering the dirt from the air.
Along the edges of carpeted stairs.
While your carpet edges are still damp use your carpet edge cleaning brush toothbrush or grout cleaning brush to scrub the carpet.
The first step to preventing filtration soiling is to be sure that your ducts are clean.