DIY put a bit of peroxide on it to get the blood out. I normally rinse mine out immediately with water that I always carry in my pack.
Just thinking as I type this but another thing that might help is apply some Vaseline to the hole to keep the juices out. Or maybe even some Scent Away or Dead Down Wind deodorant. Its soft enough to go in but should not interfere with getting something in to turn it off.
I like the Nockturnals over all the others I've tried.