Amazon.com: Glo Germ Gel 8 Ounce: Industrial & Scientific
Glo Germ Gel will illuminate under UV light, showing where actual germs would reside. Our gel works best for demonstrations where frequent or numerous uses are required. Pump 1-2 strokes of gel on palms of hands and rub together, including bthe back of hands. Scrape fingernails on pals to "infect" germs under the nails.