Bests & Worsts Reviews from Amazon

Over a year ago I suddenly had a severe rash (like scalding) on my upper body. After many weeks of discomfort and medications from the doctor, my wife realized that it was the Ecos laundry detergent (we were using the unscented from Costco - without a problem, but she noticed that the product now had a magnolia and lily scent). I wrote the company who claimed that there was no reason for their product to cause a rash. Now I read in one of the reviews "About COCAMIDOPROPYL BETAINE: Cocamidopropyl betaine is a synthetic surfactant; it has been associated with irritation and allergic contact dermatitis, reactions that could be due to the ingredient itself or to impurities present in it, such as 3-dimethylaminopropylamine."