I have a chronic bad taste in my mouth. I brush my teeth at least twice a day, and floss daily. I do not smoke. I have been to several dentists and they say that I have good oral hygiene and cannot identify a problem. I visited my primary care doctor as well. I have tried a variety of toothpastes and mouth washes and nothing seems to help. I am so self conscious about this and I don't know what to do! I feel like I've tried everything!