I occassionally have the same problem. One thing that I found that helps is to use the feature that keeps the heater fan on after the car is turned off. After the car is turned off, hit the recirculation ( rest ) button. This seems to help dry out the A/C system resulting in no condensation to get stinky.

I have yet to experience the bad odor when I have used the REST feature.

I also suspect that my A/C drain hose may be plugged. I have yet to investigate this. I never see any water under car after using the A/C. The odor can't be due to a dirty cabin filter as I have a base coupe.