Judging by the color of your tongue, it's either infected or covered with filth and smelly.
it´s probably pussy cheese, you get that on your tongue when you eat some girl-bacon
Mouth wash is good for the gaps between your teeth or places which are in general hard to reach. When you´re done with a bottle, wait for a month until you buy the next one so your oral flora can also relax for a bit
As Gurgumul mentioned, to clean your tongue it´s best when you gently brush it with your toothbrush from time to time, that not only cleans it well but also stimulates your taste buds -> stuff will taste better lateron
...I got some dentists among my family/friends, that´s why
