Keyboard /returning /different /characters /than /pRESSED

My keyboard is back up and running. I took it out, cleaned it, and reinstalled it. Pushed rivets back in and if they "snap" in they'll hold. I got all but 3 to hold in place. Yes, this is tedious. This is a weak design, Apple. Get rid of the rivets and come up with alternatives. I have at least three ideas that'l allow for cleaning, recycling, and maintenance without replacement.

The keyboard ribbon cable connection to the circuit board showed some corrosion, this very well could have been the source of the key errors. It wasn't at all normal in minimal. I cleaned the contacts up with a damp q-tip and paper towel. I have no recollection of having ever spilling any liquid on any part of this machine so all I can think is that its condensation forming while taking the computer from the cold winter car into the higher humidity house. I suppose if you do that for a couple years, enough condensation could form to cause this corrosion.

TIPS - DO NOT place paper between the screen and keyboard and close the lid. This puts pressure on the keys and the thicker the paper the greater the pressure. It's not designed for anything in that space. I did this immediately prior to the keyboard failure. Maybe unrelated to the keyboard failure but still an observation I made.