What John has posted, is absolutely true. I was in the dairy business, many years ago and all vehicles were thoroughly steam cleaned, every day, otherwise they stank !!!!!!!!!!!!
Recently did a spill inside a car and had to resort, to removing, thoroughly cleaning both sides of carpeting and also removing all traces of splash marks.
What appeared to be a 10 minute job ( to the client ) took about 30 minutes, but the carpets still had to be dried.
rob