Ok so I've read the tips stickied on carpet cleaning the inside of the cars.. well last night i wasnt pay attention getting out of the car and dropped my dr. pepper on the passenger seat. I grabbed my extra shirt out of the trunk, and immediatley dried up as much as i could. so this morning i went to the local car wash and used their shampoo machine( mine is packed away awaiting the new garage in my new home) and after i scrubbed and vaccummed the seat, i noticed areas where i had not spilt anything had brought up a brownish color to the surface. So i tried cleaning the entire seat once more, and it moved to another area.. I cannot stand this brownish color on my seat.. can anyone tell me what im doing wrong, and how i can fix it, as well as get all my seats really clean.. im at a loss..