My mouth often stinks, sometimes brushing twice but not every day. please tell me sir what i can do for this... note that i am not addicted to any tobacco products?

Bad breath can be caused by many different factors, including sinus infections, periodontal problems, smoking, cavities, acid reflux, and your diet. Address all of these possibilities with your dentist and physician, and I'm confident that your problem will at least be minimized, and hopefully eradicated. Brushing alone will not solve your problem.