use mortien on the aircon intakes just above bonnet and below wiper blades. also open the AC cabin filter and put the can all the way inside and spray generously.
this is the exact reason i never let ANYONE eat in my car. I have hand sanitizer in my car which is used whenever someone sits in my car
Generously spraying mortien on outdoor AC vents will kill everything in its part and after using the blower at speed 4 you can throw all that gunk to the AC filter which can be replaced. Hope it works out do share what worked.....