For cleaning the oven I used a large rectangular glass baking dish to hold the solution. Added about a cup of household ammonia to the dish filled about 3/4 full of warm water. Put the top rack in the middle of the oven and set the dish on that. I usually heat the oven, turn it off, and place the solution in it late in the evening. Next day, most of the burned on stuff just wipes off.
Another cleaning solution that I like to use for glassware is 1 cup ammonia, 1 cup alchol, and a good dash of Dawn dish detergent to a sink full of hot water. Put in the glassware and soak for a few minutes. This works great for display pieces that tend to get a greasy film if kept in the kitchen. I also like it for cleaning kerosene lamps (another passion of mine, BTW.) Rinse well, and the glass will sparkle!
Lee