Hey! Well, I've felt twiching, but not anything crawling around. I have in other parts of my body though, and it's not that bad. I would say go for it! The way I usually do it is I hold the leads in each hand and press them to my face. If you get them wet it is a little bit harsh, but you don't have to use them wet if you have direct contact wth the metal. Do you have a Zapper? For the area you are zapping in, try at the nodes in your neck (tonsil area) and put your leads directly on opposit sides. (try different things if you like and see what works for you).
Keep doing the regular zapping as well.