More to explore:
cleaning glass oven door between the glass. found out that there are a bunch of screws and you can take the door totally apart. who knew? it looks brand new now!
Cleaning Oven Glass & other great cleaning tips
Baking soda and water to clean oven glass door
this lady has awesome blog for cleaning, organizing and everything!!
Clean Oven Glass with Baking Soda and Water (Also possible to Clean in between glass on oven door!)