The winter season is upon us and that means several things: festive holidays, playing in the snow, and dirty carpets. Wait a minute, what was that last one? Yes, winter brings rain, mud, snow and salt - a nightmare for anyone with carpet in their homes. You don't have to resign yourself to perpetually dirty carpets however, it seems inevitable: when winter comes, the carpets always look so dirty ... is the season. It can be a challenge to try to keep them clean and looking go