I had the same problem when I used to chew tobacco. When you chew, you try not to swallow so a lot of crud just built up in the back of my mouth. Worse, I even drank coffee and coffee coats the back of your throat. I got rid of the bad breath by stopping chewing tobacco and drinking coffee. After I brush my teeth, I put a dab of toothpaste on my forefinger and insert it all the way in the back of my mouth and rub it on the side of my throat where pockets tend to occur. It's uncomfortable but effective. You have to get way back there and rub toothpaste on the side. I hate doing it, it will make you gag, but it works! And it is free!