What is the recommended dosage of melatonin for a 4-year-old girl who has trouble falling asleep at daycare?

It is recommended to optimize the sleep hygiene and quality of sleep for your child before considering any type of product. Some tips include turning off screens at least one hour before bedtime, having a consistent wake-up time every day, using the bedroom only for sleeping, and encouraging outdoor play during the day. If these strategies do not work, you could consider trying melatonin at the lowest possible dose. It is important to be patient and willing to try different approaches to improve your child's sleep.