What should I use to clean my batter contacts? I'm having starting problems and they look really bad. Any "home remodies" or a product I could buy at an auto shop?

coke or pepsi. They are highly acidic and do an amazying job cleaning the crud off.

I use a baking soda solution. It neutralizes the acid.

Get a metal brush from autoparts store ($1 or so)... best thing... it goes right over contacts and makes them look brand new

The cheap way is to use coke it works the best