To get rid of bacteria on your tongue you should use alcohol based mouthwash and gargle with the mouthwash.
The mouthwash helps kill bacteria in your mouth as well as on your tongue.
You should also use some apple cider vinegar to brush your tongue with as well which is another good way to kill bacteria on your tongue.
The apple cider vinegar is antibacterial and kills bacteria in your mouth, on your tongue and your teeth as well.
So you can also gargle with apple cider vinegar and also brush your tongue with some apple cider vinegar.
You can also brush your tongue using some mouthwash or hydrogen peroxide which is also good at killing bacteria on your teeth and your tongue as well.
Although most people know to brush their teeth many people forget to actually brush there tongue which can also harbor bacteria.