- Remove the oven racks
- Mix a few tablespoons of baking soda with a little water in a bowl. The goal is to mix it into a paste that spreads easily on the surfaces to be cleaned.
- Spread the dough in the oven. The bicarbonate will turn brown.
- Leave it overnight. The bicarbonate needs at least 12 hours to work.
- The next day: take a damp cloth to remove as much bicarbonate as possible.
- Pour some vinegar into the spray bottle and spray the surfaces where there are still traces of baking soda.
- Wipe with a damp cloth.
- Place the racks back in the oven.
- Set the oven to a low temperature for 15–20 minutes to allow it to dry.

The window:
- Take baking soda and add a little water to make a thick paste.
- Apply the paste to the window.
- Let it rest for 30 minutes.
- Use a cloth to wipe the window.
The result is truly breathtaking. I wish there were brilliant tips like this for everything in life!