A.C.
I struggled with this as well. Try Huggies. The problem with Pampers and Luvs is the back waistband of the diaper has no elastic, so it doesn't grip. Huggies has it and it made a huge difference for us. Hopefully it will work for you. You could also get a few diaper covers, the plastic kind for cloth diapers. Gerber makes them. The elastic around the waist and legs helps catch the escaped stuff.