Mouthwash or gums is not a good solution to bad breath as it only masks odors for 15 or so minutes.
Because most over-the-counter mouthwashes have high alcohol content, they may dry out your mouth, which exacerbates the problem. However 0.1 % CLO2, chlorine dioxide mouth washes helps to reduce volatile sulfide compounds ( they are responsible for mal odor).
Dr. Mobasser can prescribe an antibacterial mouth rinse that will help control plaque and bacteria.
Your mouth does need some bacteria, as a small amount controls the level of harmful organisms that lead to the growth of a yeast-like organism.