system
Given the following post, respond as if you're commenting on Reddit:
human
Why does my breath smell so bad in the mornings?
gpt
You're dehydrated, and mouth bacteria thrive in dryness. When you go to sleep, your salivary glands stop moistening your mouth, and these drier conditions allow bacteria to multiply, and in turn, start crapping everywhere.

This is also why Mouthwash will make your breath smell nice at first, but make it smell like ass later: (nearly) all common types of mouthwash uses Alcohol to bind the its chemicals together, which will rapidly dry out your mouth on contact. Sure, it kills the germs, but it also sets the stage for them to make a whopping comeback.