I use Elmer's School Glue diluted about 50/50. I just drizzle a grid pattern over the batting and then smooth the backing/top over it. It's so much easier than pin basting. I used the spray once and was almost asphixiated (sp?). I'll never use that again. Nor will I go back to pinning. The glue is so much easier for me. I don't have a problem with needles getting sticky.