Since I change a literal butt load of diapers I almost have a sixth sense of when is getting past it’s prime. The tale tale signs such as sagging and yellow stains and the all powerful smell there are a few other ways to tell. The wonderful fidgeting is one clue and if they are a good baby they can tell you all about what they did. So if you are on a play date and start noticing these telling signs better go and tell their mommy, daddy,or sitter because that diaper has been well worn.   Daddy Paul