I feel sorry for all of you because I have a couple of friends that had that problem, (1) from rotting teeth and it was disturbing. But what I'd like to know is what are you all eating? It may boil down to your diet. White flour has bad effects on your stomach and what goes in must come out. Do you eat fresh vegetables (non cooked) salads? at least 1 time daily? Do you drink water? Soda is bad, sugar is bad!
If I eat crackers or potato chips or cookies late at nite, my mouth tastes bad. I'd hate to smell what I taste and of course, I have peridontal disease.
So try eating better... fresh foods!
I have recently begun to try (big word try) to eat better, although I don't suffer with halitosis. I drink a glass of prune juice daily (it doesn't taste that bad) and it helps to clear waste in my stomach, it may help!
and WATER, WATER, WATER! not cold and not with your food, 1/2 hour after your meals! (room temperature)! Sometimes you really have to look at your diet!
Also, find someone that does colonics (cleaning out of your colon) it's like an inema that cleans out your colon. not that expensive. Things have been known to stay in your colon for years creating decay inside.
Good Luck to all of you and God Bless!
Good Luck!