I've been using Dritz basting spray on large quilts and have had no problem at all. I usually clean the bobbin well and the needle clamp when I change the bobbin thread as well to remove lint or any other debris that accumulate on the machine. I also use a size 14 needle on thinner quilts, and size 16 on the heavier ones such as denim quilt. I prefer spray basting since I can do it in sections on a large table instead of getting on the floor.