The glass on your oven provides a nice window to see what you're cooking without opening up the door (letting the heat out). That window comes in handy, but not if it's gunked up with burnt food particles. Then it just looks more like a hot mess. Clean up that window and get your oven looking sparkly clean again by following the instructions below.
The inside portion of your window can be cleaned using the self-cleaning option on your oven. If you don't happen to have that option, you can still get your oven window clean. Take 1/4 cup of white vinegar, 1/8 cup of liquid dish soap, and 2 cups of water in a spray bottle. Spray this on your oven window. Then sprinkle about 3 tbsp. of baking soda over where you just sprayed. Next, spray the mixture on top of the baking soda. Leave this on the glass overnight. The next morning, wipe up the gunk with a soft sponge or soft cloth. It may take some scrubbing if you had a lot of built-up gunk.
The exterior portion of the window is not going to get clean with the self-cleaning option on your oven. This needs to be cleaned by hand and can be done using your usual glass cleaner, or to help remove any grease or oils from cooking, use hot water and dish soap. Scrub it clean using a microfiber cloth or a sponge.
Between The Glass
If after cleaning the interior and exterior portions of the glass you notice gunk still built-up, it means you probably have a double plate of glass where grease, oils, and food may have spilled in between the glass. This can be cleaned as well, but it will take a little bit of work. First read your owner's manual to see how to get the door apart to get to the glass. Some may require that you take the screws out of the top of the door and then pry it apart. Some may come apart a little easier, so read your instructions first. You can try to get in between the glass by sliding a piece of wire wrapped with cloth (held tightly with a rubber band) into the vent openings at the top of the door to wipe the glass clean. This method requires you to be very gentle, so as to not scratch the door. Taking the door apart is the best method, so you can thoroughly clean it. Use either cleaning method listed above to clean this portion of the glass, then carefully put the door back together.
Cleaning the glass on your oven sometimes requires much more than just cleaning the inside and outside. To get it sparkling again, you need to get in between the glass as well. For more information, contact local professionals like J & M Appliance.