Sometimes baby bottles get a stale milky odor in them that just doesn't go away. Put a couple drops of mustard in them, swish them with water, then wash them out. You might think they will retain a mustard scent, but they won't, and the stale milky smell will go away!
Baking soda will take the nasty, sour milk smell out of baby bottles. Just fill them with some warm water and a spoonful of baking soda. Shake it up well and then rinse it out. Then you can wash them as usual. No more nasty smell!
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