The babysitter lets the kids snack too much.
What to do: Discuss the problem right away
Your evening out is no excuse for a junk-food fest at home. If your little ones are covered in crumbs when you get home, take your sitter aside for a chat. "Let her know which snacks your kids are allowed to eat and which are forbidden," says Genevieve Thiers, the founder and CEO of Sittercity.com. You might even hide foods that you don't want your kids to eat (or, better yet, keep them out of the house altogether) and leave out healthy, appealing alternatives, such as yogurt tubes, whole wheat crackers, and, for kids 4 and older, fruit kabobs and trail mix.