I've taken a piece of lightweight fusible interfacing, cut a small piece slightly larger than the tear, and carefully placed it underneath the tear (fusible side towards the tear) with a pair of tweezers and completely ironed it down. After ironing, I used Fray Check on the tear and let it dry thoroughly. It's never come apart - nor frayed - after multiple washings. I made sure to quilt THROUGH the tear to hold the fusible completely in place.