Here's another vote for using Elmer's Washable School Glue or something similar that will wash out -- perhaps something you mix up yourself, as others have suggested. There likely are recipes for that online, or perhaps even in the search function on this forum. Find some YouTube videos on glue basting, and study those. Since I've been doing glue basting I have no puckers in my quilting. I think you would be very happy with this method. Of course you must get the washable kind of glue, and yes, it really does all wash out.