When I do hinges, I always have a paper tower soaked in denatured alcohol. As soon as a drop falls where I don't want it to, I clean it and most of the time it all comes off.
Some of the times I take too long and it leaves the white streak. I usually try to clean it but even if I leave it alone. After about 5-6 flights, it goes away on its own. especially if it's in contact with oil lol.