My car has smell like chemical

[Luz Munoz]

i need help trying to find the issue I'm having with the smell in my car which started like 4 months ago.
the smell is strong like chemical and become even stronger with the heat.
If I stop the AC The smell stop.
I took the car to the dealer and they can't find anything.

What should I do?

 

[Maleficio]

Replace or remove your cabin air filter.

 

[fxlr8]

Hopefully something didn't die in the vents.