I have just the cleaner you are looking for. In fact, I believe in it so much, I contacted the manufacturer about marketing it to the hobby industry. It works great on the black specks from gassers, and you won't believe what it does for oil residue from nitro methane. The oil balls up and is easily wiped off. We had an accident with some black grease from a grill that got on white carpeting. We used every carpet cleaner available, and they wouldn't touch it. I sprayed this stuff on it, and the carpet turned back to white, before my eyes. Try this cleaner, it is reasonably priced and will replace 95% of the cleaners around your house. It is Spray Power Orange or Spray power Orange Plus. It is available at Menards. Here is a link to the website:
http://www.spraypower.com/orangeprodpage.htm I don't know if they will take my advice to advertise here and in the magazines, but they need to! If anyone doesn't have the same results I have had, with this product, please post here. I am confident I will not be eating crow!!!