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I use a product called Fruit and Veggie Wash, made by Allens Naturally.
It cost US$4.89 for 16 FL. OZ (473 ml), I got it in my local health food
store.
 
It says that is it "formualted to remove wax, oily pesticides, soil and
chemicals.
 
It's ingredients are:
Water, Cocomide DEA, Sodium Laurel Sulfate.
 
Allens Naturally
P.O. Box 514
Farmington
MI 48332-0514