What causes it and how can I avoid it?
My understanding is that it is caused by bacteria that live in your mouth. They are constantly producing certain foul-smelling chemicals, but during the day, that’s washed away quickly by a constant flow of saliva. At night, you secrete considerable less saliva, and the stuff builds up. Result: morning breath.
Don’t know if there’s any way at all to stop it.
Chaim Mattis Keller
ckeller@schicktech.com
“Sherlock Holmes once said that once you have eliminated the
impossible, whatever remains, however improbable, must be
the answer. I, however, do not like to eliminate the impossible.
The impossible often has a kind of integrity to it that the merely improbable lacks.”
– Douglas Adams’s Dirk Gently, Holistic Detective
Oscar, try using half a cup of hydrogen peroxide for mouthwash before bed. Be very thorough, but use only a small zip for each swish, because of the foaming.
I have heard the peroxide wash can actually be bad for your mouth as it not only kills the bad germs but also the good ones.
The best method I have heard (and tried) is
scraping the tongue and then brushing it just like it was one of your teeth. You can buy a scraper at any drug store. Give it a try.
The snozberries taste like snozberries!
Several large shots of the strongest alcohol you can find. Kills the germs and loosens up your attitudes towards that funny smell emanating from your tongue.
Brush your teeth before bed, but also brush your tongue - put the toothbrush at the back of the tongue and brush forward - no special implements needed. Maybe a mouthwash too would help, but I don’t know about the peroxide thing. If you have a bed partner and she’s not complaining, don’t worry about it too much. I brush teeth & tongue before bed, but still have what I call “morning mouth” which I don’t think means bad breath, but like it just needs refreshing and I have to brush before I have my coffee, so you probably can’t get rid of it entirely.
When I was in highschool, I had jaw surgery and my jaw was wired shut for 8 weeks. Well, when that glorious moment came when the wires came off, I about fell to the floor. So, you know how your breath smells after having your mouth shut for 8 hours? Well, multiply that by 8 weeks and ewwwww!
The orthodonist gave me a very powerful toothpaste to brush with, then a very, very powerful mouthwash. I don’t remember what it was called but i do know it wasn’t an OTC. I brushed and gargled for a good half hour and i still felt as though my breath would knock over a chair. Just thought I’d share! 
MaryAnn
Sometimes life is so great you just gotta muss up your hair and quack like a duck!