Dirt and grease stains are hard to get out of the carpet, but there's an easy way to get them out!
All you need to do it put shaving cream on top of the stain. Barbasol shaving cream works best.
Lightly rub the area with your fingers and leave it on the stain for 30 seconds, then pour warm water on it before you blot it off.
When finished, put something absorbent on it with some books, or something heavy, on top and leave it for an hour or two.