Bring her to toilet before sleep, drink less water and slowly cut off when the diapers is dry means she can hold till morning or wake her middle of night bring her go toilet. Kids use to it if don't wear will feel unsecured, try not to scold if she wet the bed. Encourage her like give her some sticker to reward if she can sleep w/o diapers and tell her her peers all without diapers at night!
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