Cast on Edge unraveled?
I made a hat (in the round) with worsted weight Caron simply soft for my daughter. She's worn it a lot. Today I noticed that the somehow cast on edge is unraveling (it's ribbing). There is a loose stitch that wasn't there before and the hat is stretching there. I have taken pics to show you. The piece of yarn you see loose was the woven in end and it's still woven in.....
How do I salvage this? I was thinking of adding a crochet edge but I need to make sure nothing more unravels.