One would assume it’s just New Jersey rubbing off on the transit system, but apparently there’s more to it than that and so the New York Times brought in a professional smeller to sniff around and see if he could identify the source of the noxious odors, which reportedly have been a problem plaguing riders riders for years.

Expert Larry Sunshine quickly got to work and said the scents emanating from PATH trains range from “a touch of dampness” to “mildewy, moldy.” On top of those, he also singled out a new plastic seat smell and the fresh aroma of printed ads, providing a full olfactory experience for commuters.