Try using Iodine on delicate areas-nipple, mouth, genitals...I mean don't try it!
5% 7% or 15% are simply the concentration of iodine, meaning more iodine/iodide per drop :)
I don't know why Iodine works but I imagine it like a catalysator, speeding up all processes in the skin. This is why we see flakes of dead skin, Iodine doesn't dry the skin but accellerates it's regeneration. Same with scars, iodine doesn't make scars dissapear magically, our body reduces scar tissue naturally over time, with iodine only a fraction of the time is needed...many other properties but this one seems important to me.
Anyhow, I'll keep up with my routine and look if I get somewhere. Thanks for all the support, I appreciate it!