Ok, I'm TRYING to sew 1 3/4" strips to start an Amish Twist quilt. For some reason, I can't sew a 1/4" seam. I have a fairly new Singer sewing machine. I bought the quarter inch foot for it, for some reason, I continuously sew over 1/4". This happens all the time. I have to constantly measure to make sure it is 1/4" Any hints? Is it all me? Crooked eye? It is very frustrating.