If you missed it, read the down-low on what Greatist's Renew Year Challenge is all about.

Renew Year Day 19

An apple a day may keep the doctor away, but it also leaves residue on our teeth. And who likes walking around worrying about breakfast making a guest appearance in that beautiful smile of yours?

Keep those chompers food-free by flossing twice today. And while you’re at it, snack on these tasty foods for healthy teeth.

When you’re done removing plaque (yuck), take a selfie and show us those pearly whites.

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