My oven door glass had not been cleaned in — I am embarrassed to say — over a year. The window was so brown I could not tell if my cookies were done without opening the door. Every time I opened the door to check, I let out 50 degrees of heat and ruined the bake. It was a self-perpetuating cycle of failure.

I tried the spray-on oven cleaner once. The fumes made my eyes water and my throat burn. I had to open every window in the house. In January. In Minnesota. Never again.

The Baking Soda Paste — Let Chemistry Do the Work

Here is what actually works, and it costs maybe 50 cents:

1. Mix baking soda and water into a thick paste. About 1/2 cup baking soda to a few tablespoons of water. You want the consistency of pancake batter — spreadable but not runny.
2. Spread the paste all over the inside of the oven door glass. Get it thick in the brown spots. Do not worry about being neat.
3. Let it sit for at least 30 minutes. An hour is better. If it is really bad, leave it overnight. The baking soda is not scrubbing — it is chemically reacting with the baked-on grease. Time is the active ingredient here.
4. Come back with a damp microfiber cloth and wipe. Most of the gunk comes off with zero scrubbing. For stubborn spots, a plastic scraper or an old credit card lifts the residue without scratching the glass.
5. Final wipe with white vinegar on a cloth. The vinegar reacts with any remaining baking soda (fizzing means it is working) and leaves the glass streak-free.

The first time I did this, I actually called my wife into the kitchen to look at the oven window. She said it looked like we got a new oven. High point of my week, honestly.

What About the Space Between the Glass Panes?

Some ovens have two glass panes with a gap between them. Grease vapor can get trapped in there and there is no way to reach it without disassembling the door. If the inside of the outer glass is clean but you still cannot see through, this is probably your problem.

Most oven doors come apart with a few screws at the bottom. Look up your model number on YouTube. I took mine apart in 10 minutes with a screwdriver. Cleaned the inner pane, reassembled, and suddenly my oven had a window again. Just take photos as you go so you remember how it goes back together.

Prevention: The Lazy Person Approach

I keep a spray bottle of 50/50 water and white vinegar near the stove. Once a week, when the oven is cool, I spray the glass and wipe it down. Takes 30 seconds. The brown film never builds up in the first place.

Also — and I learned this the hard way — close the oven door when you spray oven cleaner anywhere. Overspray on the glass bakes on and creates a worse problem than you started with.