I agree with taking Miracle-Mineral-Supplement unactivated as mouthwash.
I used it a few times.
Normally I have horrible breath in the morning because I usually have a snack before bed and wake up and smell like road-kill. I also don't brush my teeth as often as I should. I have slightly yellow teeth and I do not smoke or drink or anything.
Anyway, one night when I took it as mouthwash and woke the next morning I breathed in my wife's face and asked her if it was bad. She said it was quite an improvement over the usual.