Setting an alarm for registration day does sound a little silly.

Oh man, the rinse time is key but the water temp is just as big a deal. I found cool water helps close the cuticle and lock the tone in, but if it's too cold it doesn't actually remove all the product. I aim for a full minute with lukewarm water, then finish with a cool minute. That seems to get everything out without shocking the hair.

Actually, corrosion wouldn't change the procedure itself. Might mean they need to check more often though.