CoyoteMagic explains how she does it on page 6 of this thread. Here is a link to that page:
http://www.quiltingboard.com/main-f1...t180790-6.html
If I am remembering correctly, CoyoteMagic uses fine lines of glue. Someone else has posted about diluting the glue and spraying it on, but there are not many details about that method. It could be worth a try. My concern would be that the spray nozzle would clog quickly, but perhaps it does not.