I have used this a couple of times on customers cars and have been very impressed with the result
https://www.bilthamber.com/air-con-bomb-citrus
You put the cannister in the footwell and press the button, you leave the car idling with the A/C on and on recirculate with the windows shut. After a few mins it stops and you leave the car shut. I leave it a couple of hours before I open the car.
Not cheap but you pay for what you get.