hi there,i am trying to revitalise a kettle which had accumulated
some hard water deposits.

i boiled some undiluted white vinegar in it and left for a few hours.i
looked down the lid and the chrome coloured element was shiny as new.

to keep it new i decided to use bottled water in it from now on.

a few weeks later i noticed floating particles in my tea. i checked
the kettle to find quite a 1cm white formation growing on a part of
the element. in addition some areas of the element had green corrosion
marks.

Any ideas what is going on down there?How do you clean your kettles?
thanks,

Sam