I had one or two water marks and light soiling sit on my BMW. There upholstery cleaner so, where the seats afterwards look worse than before but not in this. it's really easy, spray on, leave for a few seconds and when considerable amount of dirt (I made it fit during) with a brush and then wipe cloth einschrubben with. and the seats look like new, and the workload is low.
because then, of course, necessarily more feuchtigeit in internal than previously I recommend then to make two to three bags or trays of salt into the car, so it's faster dry again.