I had a lady ask if I could clean a rug for her. She said the reason she wanted the rug cleaning was that there was an odour when the rug got wet. I believe she called it a "killim" or "killin" rug. The rug duly arrived at my premises and I set to cleaning it. Sure enough I got a strong "chemical" smell. I have to say that the rug was not particularly soiled so I am at a loss as to what caused the smell. I have cleaned the rug successfully and it looks fine but I would like to be able to tell the customer what causes the rug to give off an odour when wet. Anybody got any ideas?