gottabow,
it's pretty simple...
Start with some number 4 nylon serving cut of 10 "es or so.
Now start with basic overhand knots....(the first step in tying your shoe).
one on the facing you, then, working down (or up your pref here but I do like to keep the finish not away from my nock so I go up), one on the back side, I do this 4 times, 4 in front 4 in back....on the last knot, I double the overhand knot and pull tight. Cut your tags appx 1/4" and burn them with a lighter ...they'll burn and start melting...once they are close to burning into the knot I'll mash them into the nock point I just made by wetting my fingers..pretty simple and it works extremely well.
If you tie the over hand knots to tight you wont be able to twist the knock up or down..if it's too loose it'll be sloopy and move on you. I dont tightn them too tight more like slightly more then snug by a skosh :D . If you find yourself too LOOSE..you can always hittm with a dab of super glue once you get it where you want.
My dental floss nock points would eventually go to crap on me and they can be a pain to set just where you want them. I think it has more to do with how I shoot but for whatever reason I always tore them up. I did shoot every day at one point in life. Who knows, but what I do know is since I moved on to tying on nocks with serving material problems solved! You'll see a red number 4 nylon nock on all of my bows.