How to replace defroster on Honda Accord rear window?

I have a 1998 Honda Accord with a rear window defroster that still works but the window is hard to see through. Over the years the defroster "sheet" has become opaque is there way to remove this and install another one? Or would it be cheaper just to replace the back glass?|||The traces are on the inside of the glass. You get them off just like you would get a big label off. With a scraper. Then you can install an new defroster using the old wires. It's just like putting a big decal on the inside of the window.|||I own a 1998 honda accord and as far as i am aware there is no (sheet) on the rear screen but there may be a window tint that has been applied after market that is becoming opaque if you can check that this is the case then try and remove it very carefully trying not to damage the heater element wires as these are not reparable and cannot be replaced the only other way is to replace the rear screen (expensive)