When I get really frustrated with threading a needle, I pull the tip of the thread across my lips. It coats the thread with whatever I have on my lips. If I have Chap Stick on, it simply give it a waxy coat that makes the tip of the thread stiffer. But this can be a dangerous thing to do if you have lipstick on! The thread will get coated with lipstick that will stiffen the thread, but you have to make sure you cut the tip of the thread off after the needled is threaded. Otherwise, you'll get lipstick on your fabric if the thread's tip drags on the fabric.