When I shower in the morning I put a dropper full of Lugols
5% in a 16oz cup and fill the cup with water from the shower, then pour it slowly over my head, face, armpits, etc, then drip dry for a bit before patting myself dry.
My skin has cleared up nicely and no signs of any dandruff I used to have to deal with. Plus, I just feel a whole lot cleaner when I step out of the shower. Do this once or twice a week.
I need to add that I have a chlorine filter on the shower head that helps reduce my exposure to chlorine. Picked it up at one of the big box hardware stores in the plumbing dept.