You take a toothpick and scrape it on your teeth until some white stuff comes off. Leave it on the toothpick for a couple of mins. then wipe it off onto your finger and smell it. that's what i do when i want to smell my own breath...
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if you lick the back of your hand and smell it that's how you can test your breath, although be aware that you may be smelling your hand, and not your saliva.
Lick the back of your hand a few times. Let it dry then smell it. That will be how your breath smells like.
you can smell your own breath if you get a spoon and scrape your tonge with the spoon and then wait for it to dry and then smell it...:)