Hello Linda,
Yep, looks like the seal has failed on your 1/2 circle top window, as well as the grids having collapsed. Easiest and most cost effective way for you handle this is to find a glass repla ... read more
We have written on good bit on this subject: Please take a look at these blogs we wrote!
http://blog.akatlanta.com/2010/11/10-mistakes-not-to-make-when-heating.html
http://blog.akatlanta.com/2010/11/7 ... read more