Get From http://www.sunflowerbaby.com/cloth-diapers/ -
This sounds obvious, but diapers aren't designed to hold large amounts of urine, and once they've reached their saturation point, the only place for the urine to go is out the sides and top. The American Pregnancy Association suggests that you give your baby a dry diaper every two or three hours. If you know your baby has urinated in his cloth diapers, change it right away. Not only will this prevent future leaks, but it'll also reduce his risk of diaper rash.