Ask LJ re: Rug Cleaning

[logisticslad]

I have several flat area rugs that could do with a bit of cleaning. When I vacuum them, they still have a layer of cat hair and have taken on a grayish appearance. The small ones would fit in the washer, but might unravel. Are there any useful rug cleaning products out there? Should I rent one of those Rug Doctor things from the supermarket? Any other advice on how to clean them? Should I do anything different for my wall-to-wall low pile carpeting upstairs?