A little bit of washable school glue goes a long way. I glue my quilts and bindings this way. To do bindings I use a long stick like a wooden skewer that you make kabobs with. Dip that in my glue bottle and run it along the edge of the quilt. Fold my binding over and press. I keep both the iron and the glue away from the folded edge of my binding because I want that free for handing sewing it down. The iron sets the glue otherwise the binding will not stay in place until the glue dries. To use glue when sandwiching the quilt I don't use an iron but rather just let it dry over night or for a few hours. There is a tendency I think for people to use too much glue using this method. You really don't need a whole lot to keep things in place.