There are 2 strategies: swishing it all-around your mouth, or mixing it with baking soda and location it on the teeth as a paste just before rinsing. Whitening doesn't have to require chemicals. As a substitute, attempt things such as brushing with baking soda or rinsing with hydrogen peroxide. https://iwanttobookmark.com/story17128398/detailed-notes-on-natural-medicine-for-whitening-teeth