So far....nothing really "works". The best thing I've found is CRC Brakeclean (the red one WITH chlorine), a cloth you don't care about and a LOT of rubbing! It works best if you get any major build-ups off first by scraping it, then using the cloth, ect. I've found NOTHING that gets it out of carpet.
I even tried to burn it off with MAPP gas on some of the metal bracing it got on. The result was it turned to liquid and ran. Eventually it would char, but then it was an even larger pain in the arse to get off! (note: DO NOT BREATHE THE FUMES!!! IT IS TOXIC!!) I also wear two pairs of chemical resistant gloves to keep it off my hands.
I'm going to have to replace the carpet in my car because of this crap...well, that and it's a bit worn out on the driver's side. Too bad ACC went up in price. It's now $230 and that doesn't include the trunk.
I'm also torn on what color to get that in. I want the seat to blend into the interior a bit more, but I'm afraid that if I try to make large areas inside that color that the whole interior will look like crap because I'll have too many shades of beige. The seats are more of a burnt orange, but they have a brownish tinge to them that makes them work well. It's odd, but it's easier to find material in that color than it is in the original beige that everything is supposed to be! LOL If I do end up going with the seats' color, then I WILL have to break it up with black.