[M5Rick]

I used an a/c de-tox spray made by Magneti Marelli after changing the micro filters.
With the engine running and a/c on max cold and fan on full, empty the can through a slightly ajar front door, after emptying close door and let the engine tick over for about 15 minutes, then switch off opening all the windows to aerate the interior and it's done.

*Oh forgot just to add, it's important to have the vent on recirculate while the de-tox is working.