At the risk of sounding stupid (ya, that would be a first
).....I asked this in another thread, but no one answered (yet)......are you guys sure the leather is not clear-coated? Can't find info on the web but, looking in the Owner's guide, leather seats are separated into King Ranch and "everything else". If the Raptor fits into the later, then the seats are probably clear-coated. If that's the case, oil/petroleum-based leather conditioners and cleaners are a definite no-no [pg. 366 of the 2011 Owner's Guide, Dec. 2010 version]. Don't know if any of the suggestions made so far fit that bill, but maybe that's partly responsible for the cracking leather thread??? Don't know.
If it's clear-coated (my 02 F150 FX4 Lariat, for example), a damp cloth (water) or some type of mild, water-based detergent does trick (I use Pinnacle Vinyl and Leather cleaner).....have to make sure, though, that you don't leave any detergent residue on the seats. I sometimes followed that with some 303 Protectant, but you have to be careful with it, or your a$$ will slide right off the seat!
The Raptor seats, though, can be a royal PIA since the seating surface is not entirely leather.
Not sure if this helps, just thought I'd throw it out there.
ernie