S.W.
Red carpet stains are the hardest to get rid of, if all else fails, after you have tried all the carpet cleaning products, the local carpet cleaning guys will have a product specifically for getting rid of red carpet stains. I had to call once when I was renting so that I could get my deposit back, it only cost $25 for that one area. I had tried ever product I could think of and some that seemed right off the wall but were suggested... so if all else fails.. it could be less expensive than replacing the carpet.