Problem with finished quilt.
Last Christmas I made a queen quilt for my daughter for Christmas. Washed it after finished and NO problems. She called this week and said one of the seems was undone about two inches. Went over and looked at it and sure enough it was. The more I looked at it it looks like it was never caught in the seam but know that it was because I always double check every seam. Was wondering if anyone else has ever had this problem. Could the thread have been old and rotten? Thanks for reading and any ideas of how to fix this baby.