I love basting with Washable Elmer's Glue. Years ago I bought some special tips that make a very fine stream. I just put those on the "blue back" labeled bottle of glue, which has been diluted (about 1/3), hold the bottle high and a very fine stream occurs on the batting. If globs appear, I take a small foam brush and gently smooth them out. I have found that if I weight my backing/batting down with my quilting rulers, mats, that it provides a better contact. I leave these items on the quilt for about 2-3 hours, then remove. Here is the link for the plastic glue tips. Note: these tips only fit the Elmer's Glue Bottles that have the "blue back" label. If the label is black, they will not fit.
https://purpledaisiesquilting.com/co...fine-glue-tips
Happy quilting everyone.