I say use both, they each serve a different purpose, contact cleaner to dissolve corrosion, wd40 to lubricate and protect against corrosion, idealy tho, they are both a liquid under pressure to blow away and wash away dust and grime.
I opened up the assembly again and used more contact cleaner and more wd40, actuated all the switchs many times, everything is working again. YAY! Back on the road again. Thanks for yalls help!
Great job in solving the problem and thanks for sharing the process with all of us so we can learn too.