Squirt Glitterbug Lotion onto your hands and rub it in, just as you would with moisturiser
Wash your hands, just as you would normally
Use the UV Torch to illuminate all the lotion that hasn't been washed out. This shows you how poorly (or well) you have washed your hands.
Yuck! Look at that! Now's a good time to perfect your handwashing techniques using our online guide, and then try the GlitterBug again.