How to Remove Filtration Soiling from Carpet

By Doyle BlossImage

What is Filtration Soiling?

According to author Michael Hilton in the “Carpet Buyer’s Handbook, Filtration soil is a term used to describe dark, grayish lines that may appear on carpet. This is not a carpet defect, but a situation in which dust 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 airflow and the level of pollutants in the air. Filtration soiling is not a result of the quality of carpet selected. The condition will obviously appear more pronounced on lighter colorations than darker colorations. Filtration soil areas may appear around baseboards, under doors, along the edges of stairs and possibly away from walls where plywood sub flooring materials have been joined. Generally, the concentrated air flow will be from an upper level to a lower level of the home.


Steps for removing filtration soiling:

Unfortunately, many of the specialized filtration soil removers sold in our industry may work well at removing the filtration soiling temporarily, but they leave behind so much sticky residue, they contribute to the rapid resoiling of the same area. CleanMaster Natural Orange works extremely well at removing the filtration soiling and when used properly does not leave sticky residue behind. For extreme cases, you may also want to have on hand CleanMaster SpotMaster Gel XP.

1.       Always pre-test all cleaning solutions in an inconspicuous area for colorfastness prior to application.

2.       To protect the wall or baseboard, use a “shim” of some kind — this can be a piece of wood, plastic or cardboard that will protect the wall or baseboard.

3.       Mix one part solution of CleanMaster Natural Orange with 10 parts water in a trigger sprayer, flip-top spotting bottle, or hand-held pump-up sprayer. (In extreme cases apply SpotMaster Gel XP along the top of the affected carpet.

4.       Apply Natural Orange with an even spray and let dwell for a few minutes. Apply plenty of solution to the spot or stain

5.       Be careful not to over spray or breath mist.

6.       Work the solution in with as much agitation as you safely can with your spotting spatula

7.       Allow to dwell 2-5 minutes.

8.       Extract with an acid/neutralizing rinse like CleanMaster ClearWater Rinse. The hotter the water you can produce (and that is safe for the fiber) the better results you will have.

9.       If discoloration remains, apply CleanMaster KnockOut 1 to the affected area and allow to dry.

10.    For faster drying, especially in humid environments, consider the use of an axial, centrifugal, or downdraft air mover after cleaning.

To order any of these cleaning solutions, contact your local HydraMaster Distributor. To find your local HydraMaster Distributor, click here.

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