How to Use a Diaper Genie. Learning how to manage your baby's dirty diapers involves a bit of trial and error—how often should you take your child's dirty. In this post, you will learn the simple process of using a Diaper Genie and some tips on how to use it the right way. Congratulations! You now own the Playtex®. Diaper Genie® II, a truly superior diaper disposal system. To ensure your. Diaper Genie II System works the best it .