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[–] 4 points 2 hours ago (1 child)

It makes sense if you think about it. The flouride needs to rest on your teeth to harden them properly.

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  • [–] 1 point 2 hours ago*

    I've updated my comment. I wouldn't have intuitively thought about this because why would I think that it would take time for Fluoride to take effect, or that whatever is left after rinsing wouldn't do the job? Thanks.

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