I wonder! if a turn to the worse is preceded by a atmospheric pressure drop which lowers the pressure above the surface of the canal/s allows the escape of gas from the bottom layer of the canal, hence the the fetid smell!!
I wonder! if a turn to the worse is preceded by a atmospheric pressure drop which lowers the pressure above the surface of the canal/s allows the escape of gas from the bottom layer of the canal, hence the the fetid smell!!