|Alot of people may already know this, but some others may find it helpful. When threading wooly nylon through loopers or needles, I use beeswax to coat the end of the thread.
Hold the thread TIGHTLY between your thumb and a small block of beeswax about three inches from the end of the thread. Pull on the spool end of the thread so that the end gets rubbed along the wax and gets coated. Sometimes you have to do that more than once. Now you can twirl, flatten, or otherwise shape the thread.
We learned this trick in the factory where I sewed longjohns and had to thread four needles and a looper on a big industrial machine with wooly nylon.