First off, you need Hydrogen Peroxide, Hydrogen peroxide has been used as an antiseptic and anti-bacterial agent for many years due to its oxidizing effect. While its use has decreased in recent years with the popularity of readily available over the counter products, it is still used by many hospitals, doctors and dentists. Please do not consume a lot, if you consume the whole bottle you will get irradiation’s in your mouth and tongue. Also do not buy pure hydrogen peroxide or it will explode in your mouth. But, simply gargle it every day. If there is a lot of white foam created then that means there is a lot of bacteria and that you should brush your teeth more and gargle this more. Also it looks kinda of like water so pour some into a glass (not a big glass!) and serve it to the person you want to see if there mouths are dirty. Girls I suggest you try this with your boyfriend because if you kiss him you don’t know if his mouth is filled with germs!! I hope this helped you!