I draw a fine grid with the glue, about 4"x4", and dry it with the iron, smoothing it out completely. I get a very thin line if I move the glue applicator very quickly across the quilt--also I finish faster that way. I had one quilt that I had half finished thread basting a few months ago. Now I came back to it, and used Elmer's School Glue on the rest. It was so much easier. I don't think I'm ever going to do it any other way but with the glue. Spray basting makes a mess, and in my view does not give as good results. One thing I do when I'm done basting with the glue is baste stitch with the machine all around the outside edges of the quilt, inside the 1/4" seam allowance--I used to do that with the spray basting too, just to keep the sandwich from opening up at any time during quilting, or while waiting to be quilted.