I, too, use the Sta-flo liquid starch mixed at a 50/50 ratio into a spray bottle. I usually spray my yardage after pre-washing prior to use. I tend to also re-spray sub-cuts since I tend to sew in fits and starts. If I'm dealing with pieces or blocks with bias edges, I'll spray some more. Once I've finished quilting I wash my quilts so I'm not concerned with any leftover starch/scents.