They all do that, sir. Try switching the AC off about 10 minutes before
the end of the journey so the heat exchanger gets flushed through with
fresh air.

You can also get deodorising sprays from a car parts place - or I find
Febreeze works well too. It might have a different name in your country.  

You set the AC to re-circulate and spray into the car interior air
*intake*. Dunno where it is in your model - on some it's above the
passenger footwell.