My batteries are having intermittent connection issues. I think it's because the deans connectors are oxidized/dirty. I want to try some sort of contact cleaner and/or de-oxidizer. Any recommendations and where to get it?

CRC makes several with slightly different properties. Available at Home Depot in the electrical department. Blue spray cans

I use DeoxIT:

http://www.caig.com/

I believe the application pens are available at Radio Shack.

Thumbs up on that, Me Too.

coke....................

Cheap and easy solution= Mix a spoon full of baking soda with a cup of water. submerge the contacts in the solution, any corrosion should produce bubbles until it is gone.