Jeff Farber Browse All Authors Famous Quotes by Jeff Farber Leafy greens, such as lettuce, can become contaminated in the field by soil, contaminated water, animals or improperly composted manure, lettuce can also be contaminated by bacteria during and after harvest from handling, storing and transporting the produce. Jeff Farber health-news There is no need to use anything other than water to wash lettuce, washing it gently with water is as effective as using produce cleansers. Jeff Farber health-news