If you've got corrosion inside of your cable(s), enough to see a 1/4" in and clean out with the brush

, you would do well to skip the mess altogether and get yourself some brand new shiny cables (go ahead and get the pos & neg

) from Advance Auto or the like... $20-$30 and they just might help ya do it!
Being broke is no fun, but being stranded just plain sucks! ***

I shoulda got the darn cables!!!

*** lol
~good luck