Hero999 said:You could easilly reverse the effects of wear by heating the wire untill it's cherry red but that will probably distroy the chrome plating on the crocadile clips.
Copper annealing is actually done at temperature's from 761°F to 950°F. Cherry red is 1652°F and a little to hot because its melting temp. is 1981°F.
These numbers are for pure copper and might be slightly different for copper wire.