I absolutely think it's critical to control your scent from the neck up. Most of you're "neck-up" scent is from your mouth. I don't use the gum, but I do brush with baking soda toothpaste and I use a scentlock face mask. I also try to breathe through my nose as much as possible. It only makes sense. Think about it - ifpeople can smell your breath the deer can too.It makes no sense to shower,spray your boots, wear the scentlok clothes and then forget about your mouth. It's one of the stinkiest parts of your body! Why wouldn't you want to controlyour breath stink? If you're girlfriend can smell your breath so can the deer! At least put on a scentlok mask....