How to Run a Handwashing Demonstration in a Commercial Kitchen

To run a handwashing demonstration in a commercial kitchen, work in a darkened area, apply a small amount of GloGerm gel or oil to each participant's hands like lotion, and check their hands under a long-wave UV lamp so the simulated "germs" glow. Have them wash the FDA-recommended way — soap and warm water, scrubbing all surfaces for at least 20 seconds — then check again under UV. Any spots still glowing show exactly where their technique failed: usually thumbs, fingertips, nail beds, and between the fingers. The whole demo takes about five minutes per group and makes invisible contamination impossible to ignore.

What is a GloGerm handwashing demonstration?

A GloGerm handwashing demonstration is a training exercise that makes the germs left behind by poor handwashing visible. Participants coat their hands in a fluorescent simulation lotion, wash normally, then view their hands under UV light to see what they missed. GloGerm gel and oil simulate the behaviour of real pathogens — they cling to skin and are removed with roughly the same effort as bacteria, so the residue map mirrors real contamination.

Source: Effectiveness of a Glo Germ-based assessment — NCBI PMC12891148.

What do you need to run the demonstration?

You need four things: GloGerm gel or oil, a long-wave UV lamp, a handwashing sink with soap and warm water, and a space you can darken.

• GloGerm gel or oil — gel is water-based and won't stain; oil glows brighter but can stain clothing. See GloGerm Gel vs Powder vs Oil.
• A long-wave UV lamp (365nm ideal) — this makes the simulated germs fluoresce. See What UV Light Do You Need for GloGerm?
• A sink, soap, warm water, and paper towel.
• A darkened area — the demo works best with the lights down.

Note: Always check for allergies before applying — the gel formulation contains soy oil.

How do you run the demonstration, step by step?

Run it in five steps: apply, check, wash, re-check, debrief.

1. Apply the gel or oil. Shake the bottle well. Place a small amount (about the size of a quarter) in one palm and have the participant rub it over both hands like lotion — covering the backs, between fingers, around cuticles, and under the nails. Wipe off any excess with a paper towel.
2. Check hands under UV before washing. In the darkened area, hold hands under the UV lamp. The simulated germs glow, showing full coverage — this is the "before."
3. Wash the FDA-recommended way. Wet hands, apply soap, scrub all surfaces for at least 20 seconds, rinse under warm running water, and dry.
4. Re-check hands under UV. Return to the lamp. Any areas still glowing are the spots the participant missed — commonly thumbs, fingertips, nail beds, and between the fingers.
5. Debrief. Point out the missed zones and connect them to real contamination risk. Repeat the wash if time allows to show improvement.

Chapped or cracked skin holds the residue longer, which demonstrates that damaged skin also harbours more real bacteria.

What does proper handwashing look like in a food setting?

The FDA Food Code and CDC both specify the same core method: wet, soap, scrub every surface of the hands for at least 20 seconds, rinse, and dry. GloGerm makes it obvious when any of those surfaces get skipped. In the hospital cleaning-staff study, residual contamination was most frequent in the interdigital spaces (between fingers), fingertips, and backs of the fingers — the same zones a food handler misses.

Source: NCBI PMC12891148.

Why does the demonstration work — what problem does it solve?

It works because handwashing failure in food service is common, invisible, and directly causes outbreaks. The demo converts an abstract rule into physical proof each worker can see on their own hands.

• The spread of germs from food workers' hands accounts for nine of ten outbreaks in which food was contaminated by workers, and workers wash their hands when they should only about one in three times. Source: U.S. CDC, Food Worker Handwashing in Restaurants.
• Only 1 in 4 workers washed after handling raw animal products or dirty equipment, and only 1 in 10 after touching their face or body. Source: U.S. CDC, Food Worker Handwashing in Restaurants.
• A 45-minute GloGerm-based demonstration cut hand-hygiene failures from 33.75% to 8.75% among trained staff. Source: NCBI PMC12891148.

Should you use gel or oil for the handwashing demo?

Use gel for most food-service handwashing demos — it's water-based, applies like lotion, and won't stain aprons or clothing. Choose oil only when you want a brighter glow and can control for staining. Powder is for surface/cross-contamination demos, not handwashing — see How to Demonstrate Cross-Contamination with GloGerm Powder.