I stiffen the thread end with Fray Check to assist with the needle threading process.
just need to give the thread a few moments to dry. And put a paper or something under the thread to keep the Fray Check off other surfaces.
I just spent many minutes a day or two ago fighting with a limp thread that did not want to go through the eye of the needle. And thus needle had an eye bug enough to walk a camel through. It would have been way too easy to look for the Fray Check then - assuming I could have found it.