MonoPoly is very thin as it should be. Is not sticky nor thick. I use it alot. As suggested by Superior, use a topstitch thread. I turn my tension down to 2. I also use a thin cotton in the bobbin. Do not use your thread cutter as it will snap out of the needle. Its the best invisible on the market. Will not turn yellow or brittle like nylon will. Another thought, you may want to put the spool in a jar or a container as it may be getting twisted and caught during delivery to the thread path. That did happen to me. Operator error not the threads fault!!