Feltching Problems are the worst! Sorry, couldn't resist! I could be that you are using too much glue. When I fletched my blazers on wraps, I found it best to apply the glue to the blazer, then dab it in a paper towel to get the excess off, and then put the blazer on the arrow. They all stuck, and very quickly. Give that a try and see if it helps. IT seems that the less glue the better.