Clean Hands, Safe Eats: The Art and Science of Handwashing in Foodservice Operations

Last week, I had the pleasure of joining one of our FoodHandler partners, Martin Bros. Distributing, for a Webinar on handwashing. During the webinar, we got into some of the nuts and bolts, and science, behind washing your hands.

I know this is likely an elementary topic to those of you who live and breathe food safety in the foodservice operations across our country everday, but it really goes beyond a routine task. Handwashing is both an art and a science and plays an extremely important role in preventing foodborne illnesses.

The technique is simple enough. It begins with wetting hands under clean, running water, applying an ample amount of soap, and lathering thoroughly, creating friction by rubbing your hands together, including between fingers and under nails. The soap, doing its job as a surfactant, helps to wash away the dislodged dirt, oils, and microorganisms from your hands. This process should never be just a quick “splash and dash” under running water. It should last for at least 20 seconds and will ensure you are keeping your hands clean and protecting your guests. Last, you should dry your hands with an air dryer, or single-use paper towel, with the single-use towel being my preferred and recommended method to dry your hands.

The art of handwashing, however, extends beyond technique and includes timing. There are those critical points in the food production process where food handlers must wash their hands. These are points I am sure those of you in foodservice could recite in your sleep:

BEFORE:

  • beginning food preparation tasks
  • handling clean dishes and utensils
  • donning a pair of single-use gloves

AFTER:

  • using the restroom
  • smoking, eating, sneezing, or drinking
  • handling raw meat, poultry, or seafood
  • touching any part of your hair, face, or clothing/aprons
  • handling soiled items (such as trash or cleaning tools)
  • handling chemicals
  • touching your cell phone or other mobile devices
  • removing soiled single-use gloves
  • changing tasks

While the art of handwashing focuses on technique and timing, the science behind it delves into microbiology. Our hands are natural reservoirs for bacteria, viruses, and other microorganisms, some of which can cause foodborne illnesses. Proper handwashing disrupts this microbial population, reducing the risk of contamination. Soap and friction are both vital in this process, this is why the recommendation is to scrub your hands for a specified amount of time.

I already mentioned that soap is a surfactant, otherwise known as a surface-active agent. Surfactants are used in a wide range of consumer and industrial products. In short, a surfactant helps to lower the surface tension between two substances and helps to lift dirt and oils from our hands during the washing and rinsing process. Soap also helps to create friction between your hands, which also aids in the removal of these items from the surface of the skin. Thus, I could not emphasize more how important soap is to the handwashing process.

Soap and friction are both vital in this [handwashing] process; this is why the recommendation is to scrub your hands for a specified amount of time.

Is water temperature important? Well, not so much. Friction and soap are key, but the fact is, water temperature isn’t critical. You are unlikely to be able to wash your hands with water hot enough to kill microbes without first scalding your hands. The key is to have a water temperature that is comfortable for employees.

The last step in handwashing is to dry your hands. Now, the food code permits food handlers to dry their hands in one of four ways: (1) individual, disposable towels, (2) a continuous towel system that supplies the user with a clean towel, (3) a heated-air hand drying device, or (4) a hand drying device that employ an air-knife system that delivers a high velocity, pressurized air at ambient temperatures. First, does anyone really use continuous towel systems anymore? But second, of these four methods, the research has continuously noted that the best method to dry hands is by using the individual (single use) disposable towel. Not only is it more effective and efficient in the drying process, it removes more bacteria from the hands (again, the friction is important), and causes less contamination.

Check back later this month for our second blog post for May. I want to expand on our handwashing discussion and discuss why employees don’t wash their hands and some considerations to help improve handwashing compliance. Risk Nothing.

Proper Cooking Temperature: A Basic Food Safety Measure

Each summer, we see an increase in the incidence of foodborne illnesses. Perhaps this is because of the warmer temperatures making temperature control for Time/Temperature Control for Safety (TCS) food more difficult or perhaps it is the increased amount of people who are barbequing this time of year – it is National Picnic Month, after all!

Changing Climate: The Unseen Impact on Food Safety

In June, I was asked to participate in the Allinfoodz podcast, put on by a colleague, Dr. Amit Sharma, at Penn State University.  One of the points Dr. Sharma wanted to discuss was the impact of climate change on food safety, which is something I was certainly aware of, but not something I had done much research on.  However, when preparing for the interview and podcast, it was interesting to learn more about the relationship between the two.

Thawing Food with Food Safety in Mind

There comes a time in almost every foodservice operation where you must thaw food. Yes, I know there are those operations who have moved to fresh products only and don’t have a freezer in-house, but I am willing to bet that is more the exception than the norm. I am almost sure that anyone reading this blog who works in a foodservice operation can regurgitate what methods are acceptable to thaw food per the FDA Model Food Code. In case you don’t recall, I will discuss them briefly, but I wanted to spend some time covering these requirements a bit more in-depth – so you not only know WHAT to do, but the WHY we do it that way.

Addressing Major Food Recalls in Your Business

It seems like every year we have a large-scale food recall that reminds consumers and foodservice operators about the importance of food safety. Not that we need reminded, but it certainly puts the topic in the headlines again. Last year, it was the onion recall. This year, it may very well be the Jiff peanut butter recall, of which we are in the midst of.  At the time of the publishing, we are starting to learn more about a potential hepatitis A outbreak linked to strawberries.  If you have not been impacted by either of these recalls in your personal or business life, I would be surprised.