hi, one of my front bay windows has misted over quite badly, I was wondering if there is any way of opening up the window and cleaning up the inside, had one guy who said can\\\'t be done and give me a big quote for a new one, and another who said it can be done but its a big job and would cost me £75, didn\\\'t believe any of \\\'em, so I was wondering if you could help, thanks in advance.