that's how I felt about my toyota I did yesterday.... felt like I was doing nothing because it looked so clean but it came out like this:
I admit, I keep using other people's equipment but my parents had a bissell proheat 2x a few years ago which I loved until it broke. then they bought a hoover steamvac. hate it. Now my mom just got a proheat 2x and that's what I used. still love it.
They make those Bissell proheat (little green machine if you don't get the automotive one) portable machines, I want to get one for the car... they are $90 in store but I've found them for around $50 on ebay. they are heated as well. I like them anyway.