Homeowners who wear their shoes inside the house are bound to end up with black scuff marks on the carpet. The scuff marks are usually from grease, oil, mud or dirt that is tracked in from the outside. The stains become trapped in the carpet, leaving grayish, dingy marks. Proper stain treatment requires using cleaning solvents and common household products to effectively remove unsightly scuff marks.
Vacuum the area of the carpet that contains the black scuff marks to remove loose dirt and debris.
Prepare a carpet cleaning solution by mixing 1 cup of warm water with one-fourth teaspoon of liquid dish soap in a medium bowl.
Scrub the cleaning solution on the scuff marks with a sponge. Let stand for 15 minutes.
Remove the cleaning solution with water and blot with a dry towel. If the stain is still visible, mix 1 cup of white vinegar with 2 cups of water. Apply the mixture to the black scuff marks and allow the carpet to dry overnight.