I do go all the way with scent control with the exception of breath. I am conscience about wind and scent control. Some days deer approach and stay downwind without any idea and others days they bust me. When busted all clothes including my harness go into the wash and hang outside to dry. I leave all of my clothes and equipment outside unless it is raining. I have bought unscented oil for my bow. So I do go well beyond 1/2 way. I brush my teeth before a hunt, but not with baking soda and peroxide. Yuk! To each his own and therefore, I have a right to my own opinion. I stand by what I said - You guys are totally nuts. The breath smell suppressant manufacturers are using the P.T. Barnum philosophy "sucker born every minute". Shoot the deer if they are close enough to smell your breath. He11, you should be able to pet them!
On the other hand, when I am gun hunting my shotgun or ML is oiled with gun oil. I don't make any attempt to hide that smell. I can now reach out beyond their nose capability. I have killed plenty of deer with this approach including numerous old does and a couple for the wall. I rewash my clothes before resuming bow hunting because the gun rested on my lap.
Regarding sunflower seeds. I have had deer find the hulls at the base of my stand. Therefore, no more seeds in the stand unless I am going to swallow the hulls. No doubt I will never comprehend the deers ability to smell. I may be off base about the breath, but really...How far do you think the scent cone of a breath from someone at rest travels before dissipating or some other scent takes over? I need science not speculation. I think you're over the top.