Offer gum and/or breath mints. When someone does this to me, I assume it might be because my breath smells that day or something.
Do not offer mints/gum. Although they will get the hint, every time in the future they are innocently offered minty products they will assume the worst. Subtlety can lead to over-analyzation and neuroticism.
^ Exhibit A. Case in point.
Be frank with them, but not too serious. And have a new subject to change to so it doesn't get awkward.
Meh, I don't mind. I've never been a guy who keeps regular hours so sometimes, I forget to brush my teeth. So when someone offers me breath mints or gum, I just flat out ask, "Is that your way of telling me my breath smells? It's okay if is."
If you jokingly exchange insults like I do with my friends. "You're breath stinks. Did you eat something that's rotting." Or something along those lines.
- Wear a swine flu mask in their presence.
Be frank with them, but not too serious. And have a new subject to change to so it doesn't get awkward.