I have a Rowenta "Focus" # DZ5080. It is relatively new and is now spurting yellow/brownish streaks ; and , it has ruined three items of mine. I am feeling that it needs to be cleaned internally. If so, how might I do that? I still have the Rowenta that I had before that one. All of a sudden , it started cutting off while I was using it. It appears to have a short wire in it. Can you help me?