My 240 has a funky interior smell... i check the roof for leaks and there is none. it kinda has that mildew smell and kind of gas smell too. i tried using febreeze and oxy clean on the carpet, it sorta was ok but now the smell is back. anyone know methods to clean the carpet and interior to rid smells? im trying several different methods from soap to products that get rid of smells...no use it just comes back..