water and brake fluid are nemesis'.. just don't ever have water, near anything with brake fluid, the results will be severe corrosion, .. not good..
use the stuff that this needs..
saturate the removed pads, spray a bunch, and lay them lining side down on a multi layered towel, and repeat about 4 or five times, until the pads give up no more contamination.. then lightly scrub them on a flat surface, over a piece of 120 grit sand paper, and re-spray.. to remove the dust.
now, are we now seeing leaky seals in the calipers? this story seems never ending, I really wish you were near me, so I could fix the problems, and you could go ride..