I have had problems with water wetter, from leaking. I changed out a mobo, in my big rig, and spilled a small amount of coolant on it. It was powered down at the time, but the water wetter caused some nasty corrosion in the RAM slots, and ruined that board.
Since that time, I have used nothing but RO distilled water, and some isopropyl alcohol. Have had the same type accident, and have had no more corrosion.
steve