:shock: :?
Good fabric tears across and down (warp or woof). The secret is to tear first, then wash and square. Your drying and ironing should finish the squaring process. If you don't like strings in your washer, take time to zigzag the edges before washing. Usually, what I do is clip the selvage edge, tear both ends, zig zag the two ends together to wash them and finally toss them into the dryer that way. Voila! It is easy to work with and you never have to fear whether your quilt or your garment will "sit" right. Have you ever had a pair of jeans or kaki pants that were not cut on the square? Those are miserable to wear with seams snaking around your legs.
There has to be something seriously wrong with a piece of fabric that cannot be squared. I have been sewing and quilting nearly 60 years and have never seen one I could not square. (I made my first garment when I was eight).
:) :D