best damn degreaser i've ever used. spray on, let sit for a 30sec-1min and wipe off with rag. gets all the dirt, grease and grime out no sweat.

 

I went to walmart one day and bought this 3M scotch guard (in auto section).. It works wonders you just spray it on the seat/carpets and rub into circles and thats all.. it made my old car look brand new! i would wear a mask though if you do decide to buy this stuff ... or dont clean out your car with the windows/doors closed...