Plaque Glo toothpaste and torch highlights plaque that causes decay and gum disease. Plaque GLO contains a plaque stain, which will only be visible with the supplied blue light torch. This shows where plaque remains after brushing. 1) Brush teeth using PLAQUE GLO toothpaste. 2) Rinse thoroughly with water (as with all toothpaste products it is not recommended to swallow the paste). 3) Shine the torch onto the teeth. Remaining plaque will illuminate when exposed to the blue light. 4) Remove any remaining plaque by brushing or flossing the identified areas.