Even the best eco cleaners can use a helping hand. For really dirty clothes, add a bit of Borax into the wash water. Borax is harmless to the environment and has been the consummate multi task cleaner for over 100 years! Just add 1/2 cup to your wash as a laundry booster, or soak clothes for 30 minutes before washing for tough stains. It is safe enough for your delicates, won't harm septic systems and even helps soften hard water.