Bad breath is caused due to many reasons and unless we diagnose why you’re having this - no amount of rinsing or brushing your teeth will help you. You need to visit a dentist who can do a clinical examination and ascertain the source. The most common reasons for bad breath are tartar and plaque and the solution for that is to get a teeth cleaning ( routine/ deep) done. Tooth decay can also cause halitosis so your dentist will need to look into that and advise treatment for the same.
Health Tips
You need to follow a good oral hygiene regimen to maintain good health. This also includes cleaning your tongue everyday to prevent white tongue which can otherwise contribute to bad breath.