A study was conducted at the University of California San Diego found that children who are too clean are actually more susceptible to developing inflammation and disease - namely asthma and autoimmune disorders. They also tend to be the ones who have a higher rate of allergies. Using cleansers, soaps, and hand sanitizers excessively can actually increase those chances because they kill off important bacteria on our bodies.
Moral of the story: Don't be afraid to let kids dirty! When the hubby and I start having kids, I'm sticking to my plan! (Maybe not exactly, but in some capacity)
Image courtesy of Christendomreview