Oh and the site mods are apologising for your behavior now. No need chaps, I lurked here before registering and I'm well aware of 'bambers' style.
I was looking for help with our gas fire not on my spelling.
We have a natural flame gas fire with ceramic type 'coals' and a large curved glass 'vision' panel to see the flames. Problem is the glass has got more and more opaque over the years and it looks like its been etched on the inside. It feels like theres some form of deposit on the inside surface...