DEAR HARRIETTE: My neighbors are from another country, and honestly I think they have the worst body odor ever. Their house isn’t dirty; I think it must just be what they eat. All I know is that the smell seeps into the hallway and makes me gag. There’s nothing I can say about it, but is there anything I can do? We live in an apartment building, so we are physically close to each other. I feel sic…