Agreed with many other people, that ED is ruined and will eventually stop working. Mine came looking like the "dull" and "oxidated" contact and it's working just fine. Guess the idiot doesn't realise the old saying "If it's not broken, don't fix it". He tried to fix what was not broken and broke it. He'd be spending a lot of time re-polishing those contact every time it oxidates and sooner or later there'd be nothing left there.