Maybe it's those aft cabins that get most of the pollution. I never smell anything mid ship.
Oh, please don't tell me that. We have booked an aft cabin for a summer cruise in 2018.
I almost always book aft cabins and only once had a problem with smells or pollution and that was the soot problem on Royal Princess. I would not book an aft cabin on any Royal class ship. Actually I would not book any cabin on any Royal class ship.