Exactly what I am thinking.I was going to suggest you stop using your teeth... I have a little eyehook secured on my bench I do them on (also use it to cinch down knots when tying other rigs) and it makes it easier. It also helps you make more uniform droppers when doing alot of them.
Ahhhhhh, simplicity.We got through a ton of rigs down here in Florida because of all the sharp teeth and sharp reef. Everyone I fish with just tie with a half hitch. No dropper loop needed. I havent had a single rig break at the half hitch and have caught 100's of fish that fight harder then any tog or striper. We use 60 to 80 pound minumum.