I tried Elmer's glue and didn't like that at all. I had a can of basting spray I bought years ago and never used so I tried it on a very small wall hanging. Loved that. So I used it again last weekend on a 50" square baby quilt. I have asthma so I took it outside to spray. Finished machine quilting it this week - it's perfect! Will definitely keep using the basting spray. It's way quicker than pinning, and the fabric doesn't move around while quilting. I ended up with zero wrinkles on the back and a beautifully smooth quilt!