system
Given the following post, respond as if you're commenting on Reddit:
human
Why does my mouth taste so nasty when I wake up?

At what point in the night does my mouth go from minty freshness to open ass? And why?
gpt
When you go to bed at night and fall asleep, every part of your body also gets some rest. In your mouth there are little saliva factories that we call "glands". These factories work slower at night and produce less saliva, hence the dry mouth when you wake up.

Now, the saliva is a very cool liquid that contains a lot of things like oxygen and enzymes. All those things keep your mouth clean and destroy food and bacterias that live in your mouth.

These little bacterias (which are really small animals, kinda) multiply really fast if there is no saliva in your mouth and they can get really smelly. So if you sleep 8 hours and your mouth dries up, let's say, for 5 hours, the little bacterias multiply on and on and build up stench in your mouth.