Ac smells canyt seem to find where the ac filter is at

I am having the same issue. I changed the cabin air filter (Located under the passenger side dash - remove 4 small screws) and still cannot get rid of the musty / urine smell. I have tried all the "over the counter" ac unit sprays and I also took the car into a place that used some kind of a fogger inside the car.Unfortunatly, the smell returns. Let me know if you have any luck.I have tried all the recomendations such as, Lysol, bleach, fogger and still nothing. I believe the AC unit needs to be exposed and cleaned before the problem is resolved.Good luck!