Ive never been to the carwash place so couldnt comment on him, but I know how your wife feels Ive had same problems a few times, mostly while waiting at the side of the road for a Dolmus, Turk man on scooter pulls up and pesters, its got so that I will only wait for a Dolmus outside a market or busy place while on my own. Used to get pestered a lot also when I lived in Deliktas while walking my dogs.
Its said that they only pester English or Brit women in this way, and I think the truth is that we are bought up not to make a fuss and are scared of screaming or complaining loudly, a Turk woman would yell the place down if a man approached her in this way.