Cut three lemons in half and squeeze them. Pour the lemon juice into a saucepan and place it in the preheated oven at 250°C for about 30 minutes.

Then remove the saucepan and let the oven cool, then wipe with a damp cloth to remove all food and grease residues. Warning: make sure the saucepan is suitable for use in the oven.
The classic method: vinegar and bicarbonate
The combination of these two ingredients is one of the most powerful in household cleaning. Both have degreasing, disinfectant properties and are capable of restoring the steel of the oven to its original appearance.

Mix 100 ml of apple cider vinegar with 2 tablespoons of baking soda in a spray bottle. Wait for the effervescent reaction to finish, then spray over the entire surface of the oven.

Heat it at 120°C for about 10 minutes, then turn off and let it cool. Finally, wipe with a damp sponge to clean it thoroughly and make it look like new again.