It's winter, which means it's snowing and it's cold. And these happen to be the two elements you need to get your wool rugs seriously clean. Here's a trick for cleaning wool rugs from Scandinavia: Start by taking your rug outdoors and draping it over a railing. It needs to cool down and acclimate to the freezing temperatures, which will neutralize bacteria and help reduce odors. Then lay the rug facedown on the snow, beat it thoroughly with a broom, flip it over and beat it again with the broom. Brush off the loose snow and bring it back inside. Beating the rug in the snow loosens dirt, and the tiny frozen ice crystals remove particles from the rug. And since the rug is cold, the snow won't melt on it. Final result: A really clean rug without the use of any chemicals.