Relax and give it time is honestly the best I know to tell you. I know how frustrating it feels when it seems like they’re not “getting it”, but I have found that it’s best just to be patient. Like really, really patient. 🙂 It may take a few days, a few weeks, or a few months. Just let it go however it goes. I know you want to be done before you have a new baby, but if you are willing to let go and decide that you are okay if it doesn’t happen, I promise you will be save yourself a lot of stress. Even if you end up putting him back in diapers when the baby is born because you don’t have the time and energy to clean up the messes, it will be okay. Just let it roll for a while longer and see if he gets the hang of it before the baby comes, but don’t fret if that doesn’t happen. They all figure it out in their own timing, which isn’t always our preferred timetable. 🙂