They use paint on gloves to show the proper hand washing technique, and how easy it is to miss spots on your hands especially if you're not washing for long enough! Obviously, it's easiest to get the palms and inside of your fingers, but it's important to wash the backs of your hands and fingers, finger tips, and thumbs. This technique covers all of that and even the wrists, so give it a watch and keep this in mind when you're washing your hands, along with singing a song for 20 seconds!