Have a dehumidifier
Adjust philters of humidifiers and air conditioning
Stop using a dryer tumble
Open a window
Set plants outdoors instead of indoors.
Fans may be used.
Tip: Measure the humidity levels at home with a hygrometer each day, to ensure that your child is moistened. You can easily buy one from most hardware stores if your humidifier does not come with a built-in hygrometer.