Borrowing a link that pHaestus just posted...
http://www.bunkermentality.net/wetter.html
It's a comparison of Water Wetter, at different concentrations.
Note how too much of the stuff has a drastic effect!
Adding an observation from Bill Adams, this stuff also leaves a thin film throughout someone's rig, so he swears to stay away from it.
Now I don't want to knock it down (anymore than I already have!), so let's see if we can say something positive!
It's something we want as an anti-corrosion agent.
Ok, your turn.