Really there are two ways you can go:
1. Is to mix one table spoon of baking soda into a cup of water. Use a wire brush to clean off the terminals.
2. Remove the battery and dump the baking soda on all the terminals and parts corroding. Then get vinigar and pour it onto the Baking Soda. This will cause a chemical reaction which will do all the scrubbing for you. Then just rinse off the parts thourghly.
I did the latter and it helped to clean off all of the corrosion I was having. even cleaned all the exposed wires I had on my positive battery terminal before I took it to Ford to be replaced.
