Pouch Pants How Do You Stop The Scrunching?

How do you stop the scrunching? - pouch pants

Help! I have again and bought cloth pants Weenee EENEE bag that I absolutely love it. My problem is that by introducing layers of microfiber narrowing between the legs of my baby, that is, it is not as effective. Has anyone with these layers and have this problem?

Or is someone has an idea how Potty sculpting fabric in the crotch?