¾ cup warm tap water
1 tablespoon baking soda
10 drops of tea tree oil (antibacterial, antifungal, etc.)
2 drops oil of lavender (optional) (antiseptic and smells nice)
The Environmental Working Group (the folk who publish the annual guide to pesticides in produce) have a lot of great information on their website: www.ewg.org
Debra Lynn Dadd is one of the pioneers of non-toxic cleaning and has great information on her website: http://www.dld123.