Do I Need to Wash Lettuce? Yes, it's important to wash all fresh produce, but especially leafy greens and lettuce. Harmful bacteria from the soil can contaminate fruits and vegetables and lead to a foodborne illness if consumed.
Give the leaves a soak: After you have rinsed the head under cold running water, remove the core and chop the leaves. Colorado State University Extension says to immerse the leaves in a bowl of cold water for a few minutes to loosen the dirt.
For iceberg lettuce, remove and discard the outside layer of leaves, rinse the whole head of lettuce well under running water, shake it dry (water can work it's way inside when you rinse it) and wipe excess water off with a towel. Wrap the entire head in a paper towel, place in a plastic bag, and store in the fridge.
Produce can carry dangerous bacteria
Sometimes dirty produce can result in foodborne sickness. We have seen recent outbreaks of veggies with E. coli, Salmonella, and more,” Janette Nesheiwat, MD, says. “This can result in nausea, vomiting, diarrhea, stomach cramps, and fever, along with dehydration.”
The easiest way to clean your greens is to agitate and soak them in a large quantity of water. At the restaurant, that meant filling 10-gallon sinks with cold water to soak 20 heads of lettuce at a time. At home, just fill a large bowl or your kitchen sink.
Consumers Union, on its website, advises consumers to go ahead and give those bagged, pre-washed greens an extra washing. The bottom line is — if you eat fresh lettuce, you're taking a small risk. An additional washing won't change the risk much, one way or the other.
They Use Perforated Container
The use of perforated bins is the key to keeping lettuce fresh and crisp at all times. Restaurants keep them in perforated containers to allow air circulation in the refrigerator. To keep its crispness, lettuce requires air and a small amount of moisture.
You know the hard white core at the base of romaine or iceberg lettuce? You don't need that and the lettuce will actually last a lot longer without it. Lop it off with a knife or just pound it against a cutting board firmly and twist it off by hand.
Head lettuce like iceberg or romaine lasts for 1 to 3 weeks, while loose leaf ones like butterhead or green leaf lettuce keep for only 7 to 10 days. Store your lettuce well-wrapped in the fridge, but allow it some airflow to get rid of excess moisture.
Do I Need to Wash Lettuce? Yes, it's important to wash all fresh produce, but especially leafy greens and lettuce. Harmful bacteria from the soil can contaminate fruits and vegetables and lead to a foodborne illness if consumed.
Is It Better to Store Lettuce Washed or Unwashed? Head lettuce, such as iceberg and romaine, keeps fresh longer when it remains attached to the head and unwashed. Rinse the leaves only when you are ready to use them.
(If your bag of salad or other greens says it's pre-washed, no further work is needed.) Scrub with a brush and/or gently rub the produce with your hands, depending on what you're cleaning. Water is sufficient, so don't use soap or bleach or even commercially made produce washes.
Most produce in restaurants (greens included) should be washed upon reception, especially those that will be served raw. When it comes to salad greens, they are typically rinsed in a large container of water (frequently a clean sink), then spun dry in an industrial-size salad spinner.
If you eat contaminated leafy greens without cooking them first, such as in a salad or on a sandwich, you might get sick. CDC estimates that germs on produce eaten raw cause a large percentage of U.S. foodborne illnesses. Leafy greens and other vegetable row crops are a major source of E. coli O157 infections.
In a word, no. According to James Rogers, Ph. D., director of Food Safety and Research at Consumer Reports, if E. coli (or any other type of bacteria that can cause food poisoning) is present in your produce, washing it won't remove all of those organisms.
Lettuce is a low gas‐releasing substrate for microbiota fermentation and lettuce‐induced abdominal distension is produced by an uncoordinated activity of the abdominal walls. Correction of the somatic response might be more effective than the current dietary restriction strategy.
The easiest (and most effective) way to do this is to line a sturdy glass or plastic container with a few paper towels, then scatter your greens on top. Top with a matching lid and refrigerate. There should be some room in the container for the air to circulate, and the paper towels will absorb any excess moisture.
Place a clean dish towel or paper towels over a rimmed baking sheet (or just right on your table). Spread the leaves over the towel and let them air dry for about half an hour or or so. That's it. If they're extra wet, you can blot them a bit with another towel before leaving them to air dry.
Tearing allows leaves to break along their natural fault lines, rupturing fewer cells and reducing premature browning.
If leafy greens are labeled as "pre-washed" or "ready-to-eat," washing them is not necessary. After washing fresh greens, pat them dry with paper towels or a freshly clean kitchen towel — or use a salad spinner — to help remove excess liquid.
The Rule is: Lettuce is washed in cold Water!
Pluck lettuce and wash it quite quickly in cold water, change the water several times if it is very dirty. The process should be completed in a maximum of 10 minutes.
So, pre-washed greens are full of chemicals
Unfortunately, traces of the strong cleaners will linger on your lettuce and make it into your mouth if you're not careful. Since bleach—even diluted in water—is toxic in high quantities, it's best to re-wash your salad components yourself before you dig in.