on a mission for softness

I love hanging my clothes on the line, and I love the energy savings even more. But my laundry comes out stiff and coarse. On my search for the softest line dried clothes, I'm going to try different tips and see how they work for me. Today I tried a small amount of detergent and plain white vinegar in the rinse cycle. Worked good. Not super soft, but not sand paper either. On a scale between 1 to 10, I give this method a 7.