To use the Glo Germ™ Oil, simply place a small amount of the oil in the palm of one hand and rub both hands together like applying hand lotion. After thoroughly washing hands, turn off the lights and place the UV lamp over the hands. The “germs” are easily detected under the UV light. This graphic illustration shows where bacteria can hide and reveals areas most often missed in handwashing. The Glo Germ™ Powder can also be used to demonstrate cross contamination and surface cleaning. Kit contains an 8-oz. bottle of oil (approx. 75-100 demos), a 4-oz. bottle of powder (approx. 150-200 demos), and a battery-operated 6-1/2" UV lamp (batteries included) in a handy carrying case.