everything you just posted explains why its best to either have a very professional CS making set up or just buy CS from a reputable dealer.
in my opinion ingesting CS with very high levels of silver ions is dangerous to your health. parts per million count should be 30 or below, anything higher than that could be dangerous. since most home made methods have no way of determining ppm count, you are playing with fire.
silver is a great tool for health - IN THE RIGHT PROPORTION AND TAKEN PROPERLY!! otherwise it can do damage.
yes i know some disagree me as they happily gulp down CS of unknown ppm by the glassful but i think they are being reckless with their bodies. the only thing i would do with CS of unknown ppm would be to use externally.
anyway, the black stuff on you wires is normal, its silver being oxidized. same with the black stuff on the bottom of your glass. some CS makers create clear CS some make yellowish CS, i dont know why this is.