|When trying to straighten the grain on a knit, such as an interlock, fold fabric with selvages together, and then around where the fold line is, find one rib (they can be tiny, so I use a long clear ruler). Try your best to follow this rib the length of the ruler, and mark with chalk down the side of the ruler. I unfold the fabric and lay it out flat to do this. Easier to see the rib and follow it through to the end. When you fold it back on the chalk line, make sure that the ribs look lke they run straight across, not folding and twisting underneath.
Do this all the way down the length, and you will have as straight of a grain as you can get. Now does anyone have any tips on getting these knits to not stick together so much?