Dont Underestimate good old soap, water, and elbow grease!
Some people think that you have to buy the most expensive carpet cleaner or interior cleaner... you don't have too! regular soap and warm water with some elbow grease literally does wonders! trust me, i just "shampooed my carpet which is tan and does show stains fairly well, soap and water took them right out with a little vacuumm suction! also my steering wheel control were getting sticky/ dirty a little scrub with dish soap and water took them right out and made it look like new! i will post pics once the weather clears up! just wanted to let you guys who are picky with clean cars, soap and water works amazingly!