Weekly,: There is no perfect answer for this. From my own experience, it works to wash the bottles after every use with soap and water, and once a week I would boil/sterilize all of the bottles. I hope this helps. Good luck and enjoy your little one.
Answered 9/3/2014
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A doctor has provided 1 answer
4 doctors weighed in across 2 answers
A doctor has provided 1 answer
5 doctors weighed in across 2 answers
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