This recipe is from 'Clean can be Green' which I found from the David Suzuki site a few years ago. I use it around this time of year when giving the house a good Fall cleaning. It smells really good.
2 cups baking soda
4-5 crumbled bay leaves
1/2 cup cornstarch
1 tablespoon ground cloves
Mix. Sprinkle on carpets and let sit up to 24 hours and vacuum.