NEW YORK (CBSNewYork) – A new study finds many children are using too much toothpaste to brush their teeth.

The Centers for Disease Control and Prevention says 40 percent of kids 3-6 use a brush that was full or half full of toothpaste. That increases the risk of streaky or splotchy teeth when they get older.

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Experts recommend no more than a pea-sized amount.

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Children under 3 are supposed to use even less: Just a smear of toothpaste the size of a grain of rice will do.

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For more information and to read the report from the CDC, click here.