Tower flats in Thane increasingly have closed or semi-closed kitchens, often with a single window that opens onto a shaft rather than open air. That changes everything about how the room behaves: with no cross-draught and a shaft that pulls poorly, cooking vapour has essentially one exit — the chimney. If that chimney is not working properly, all of it stays in the room.
Older buildings near the station have the opposite layout and the opposite problem: an open window, no chimney at all, and decades of vapour on the walls.