Homemade Laundry Soap Made With Baking Soda Recipe | eHow
Though adding vinegar to laundry detergent may sound odd, vinegar is actually an effective cleaning agent. To make this powdered laundry soap, combine vinegar, baking soda, washing soda and liquid soap. Pour the liquid soap into a bowl, then stir in the washing soda and the baking soda. Add the vinegar in small batches as you stir.