If you tried brushing, mouthwash, chewing gum and breathmints, then try flossing regularly(evry other day works for me). And if that doesn't work then maybe a visit to the dentist is due. Ask for the deep cleaning, it grrrreatly improved my breath.
Brush your teeth and gargle with perioxde. It helps, trust me.
Brush your tongue. Even if you get a couple of brushes in before you start gagging ... it's better than nothing! (Thanks Nari! :-) Source: oldnaturalremedies.com
First be sure you visit your dentist .
Use dry mouth toothpaste in your daily routine. You will have fresher breath all day, all night and upon waking up. Smile !
clean teeth twice a day (once at night and once in the morning) also use mouthwash for 30 seconds
FOR BAD BREATH EAT YOGURT
Rinse out mouth with H2O2 ( Hydrogen Peroxide) about30 seconds before brushing your teeth.
Put a 1 or 2 cloves in your mouth. You can chew it or simply leave. Don't worry if you swollow it it is harmless.
Mix three cups of peppermint leaves with two cups of water. grind in blender until solution is thick. Gurgle one cup of the solution everyday for one week. Each day your breath will get better. solution should last two days. re-make every two days.
Chew some chlorophyll rich leaves such as parsley.