How long would it take to dry out car upholstery of a seat that is fairly wet. The entire seat is not wet but the parts that are wet are soaked. I am a taxi driver and a passenger has soaked the seat and I am not sure what this has been as there does not appear to be a smell from the seat. If this has been urine would this smell immediately and when this dries would there still be a smell from it? Can anyone advise if this would dry out overnight without being dried with a hairdryer for example?

If it was urine you would smell amonia immediately. Just use a wet vac on it and suck it all out right away. Once all the moisture is out it will dry in a day if you leave the doors open.