Someone, probably me :-( has dropped a piece of chocolate onto a pile carpet. The chocolate has melted in the sun and is now a dark lump of chocolate-carpet composite. The carpet is synthetic, but beyond that I don't know. My thinking is that mere detergent and water won't be sufficient, as chocolate is fairly high-fat. Other solvents available are white spirit/turps sub, methyated spirit, possibly acetone if there's any left, petrol. I don't want to dissolve the carpet and make matters worse!
Any suggestions as to how to get it out before I go at it.