|I use dental floss threaders to thread the loopers on my serger. They come in a little plastic box and look like fishing line with a loop on the end. They are stiff enough to thread through the holes and loops, but flexible. I just pull the thread though the loop on the threader and then pull it through the holes and loops.
I find them much easier than trying to use tweezers.
Oct. 12, Here's a picture of a pack I just bought.