Removing filtration soil is difficult.
The soil’s molecules are oily and have an electrical charge that binds them to carpet fibers.
First, use an oxygenated carpet cleaning product and apply as you would for pre-spraying, concentrating on the filtration lines
. Let dwell, agitate, and blot.
If this procedure isn’t successful, a more aggressive procedure is required.
- Get a moderate to stiff agitation brush or scraper and a gel solvent or carpet spot remover. Look for a product formulated for oil-based soils such as ink, lipstick, and grease.
- Put a waterproof barrier between the carpet and baseboards or walls, such as a piece of stiff plastic or cardboard, to prevent damage to the surfaces.
- Apply the spotter to the filtrated areas and allow to dwell for several minutes, then agitate to work the solution into the carpet.
- If the product requires rinsing, use a hot-water extractor with an acid/neutralizing rinse. The hotter the water, the better.
- If the product is an encapsulating formulation that does not require rinsing, wait until dry and vacuum.
- Repeat as necessary, as stubborn filtration stains may need several applications.
- Treat areas with a carpet protector to help resist future filtration soiling.
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