Visiting NY from Tokyo for Christmas, I had a chance to ride the M-8 several times, as well as the Harlem and Hudson Lines, as I reconnected with friends. The M-8's are beautiful cars - pretty much as nice as anything I ride in Japan. What did surprise me though, is how dirty the interiors on these new cars are getting, apparently from the abuse meted out by New Haven Line riders. Scuffed seat backs, beer cans and paper bags rolling around sticky floors, a seat with cuts in it...really a shame after only 8-9 months of service (was on lower-numbered cars). Oddly enough, I found the Harlem and Hudson Line trains markedly cleaner, whether they were M-7's or older cars. I don't recall New Haven Line riders being the most slovenly when I lived in the area, but they definitely win the prize this time. I'm puzzled too by car exteriors; the M-8's (and the older cars too) seem already to be getting really dirty on the outside, whereas the Harlem and Hudson Line trains were pretty shiny and clean. Does the New Haven Line have no car exterior washing facilities?