Donnasue, some use the ELMER's washable glue straight from the bottle. I am working on using it to spray but so far I dilute it 1 part glue to 3 parts water and put it in a small roller paint tray. I use a small foam roller to do a light coat on my batting (just barely moistened when I feel it with my hand). Since it is not polyester batt, I go over it with my iron to both smooth it and to slightly dry it. I let mine dry overnight hanging up so both sides get air circulation for a small quilt. For a large quilt I leave it laying out all day and all night flipping over in between to dry both sides. You know it's dry when you try to lift a tiny corner and it is stuck well. I still put a few safety pins around the edge in case I catch it while working. You do need to wash your quilt after using the glue basting.