Lots of ancedotal info here...
I have dozens of shotgun pellets embedded in my skull for over 30 years, some of them soo deeply, penetrating the bone. My lead level has held steadily at 17; no amount of casting or chelating has affected this; no sauna, no calcium, no vitamin C has affected this. The only thing EDTA has an affect on is the lead in the barrel in the cleaning of my handguns (and I have a method for doing this). Iodine supplement analog is false; Iodine supplements simply replaces the iodine-131 already held by your system. While hygiene is commendable it has no root in lead dosages.
OTOH maybe this nervous ticking is just an artifact /s