Dan,
Not sure what the problem was, but, I know that I use cement on the thread wraps before putting any foam on a hook. This makes the fly more durable plus keeps the foam from turning on the hook. Also, keep in mind that store bought flies usually have no cement used on them anywhere. They are production tied flies and they do not want them to last too long or you would not be back to purchase more!
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Warren
Warren
Fly fishing and fly tying are two things that I do, and when I am doing them, they are the only 2 things I think about. They clear my mind.