Anyone have any suggestions on how I might clean the following? A room size Berber rug that is 16 x 16 that lays directly on top of a wood floor. The rug is way to heavy to carry outside or somewhere else to clean. I have played around with using the spray type foam cleaners but the result is not very good. I'm sure that I need to use something to make the cleaner get down in the carpet but haven't found anything to do it yet. Can't use a really stiff brush cause it messes with the texture of the carpet. So....I have just been putting it off but it really is needing some cleaning. Anybody with any ideas?