I got one spool at Walmart only because it is 1.5 mi there, about 9 to JAF, and 10.5 to my favorite quilt shop. It was so bad I threw it away and drove 10 mi to buy more. Until I got it home, I didn’t even realize it was the spool with the slit. Hadn’t seen one in years. Will never ever buy thread at Wally World again. Turning the spool didn’t help, tried both the vertical and horizontal spool holders, and the thread disc did nothing.