I recently made a baby quilt and accidentally ironed a vertical blue chalk line that I had used for spacing. It didn't come out--I tried a lot of different things. You know what; my son and daughter-in-law never noticed it. I believe it will eventually wash out anyway, but I didn't want to keep washing the quilt to get it out. No one at the baby shower noticed it except me. Everyone LOVED the quilt. Things that stand out to you may never be noticed by others.