Just squirt some onto your hands, rub it in and try to wash it off. Any residue will glow under a UV light.
Most people will have successfully cleaned their palms and maybe parts of their fingers. Many, however, will miss the wrist, side of the hand, finger nails and rings. The glowing GlitterBug Potion will instantly show trainees where they are missing.
Clever Logger and LogTag loggers contain small batteries. Swallowing can lead to chemical burns, perforation of soft tissue, and death. Severe burns can occur within 2 hours of ingestion. Seek medical attention immediately.