I love glue basting. I don't dilute it but drizzle it in a grid onto the batting half at a time and smooth the fabric over it. Then flip over and repeat. Sometimes it will hang over the table. No problem.
Glue basting replaces pin basting - not spray basting - so it doesn't need to cover every space on the quilt. I've never ironed it dry - just leave it overnight. It has never gummed up or broken a needle for me and I use a dinky mechanical Brother for FMQ.
Mouse the search function - you will get lots of info