There is a knob on the oven door. Most people don’t know how useful it is.

Clean the oven glass with baking soda
Simply mix baking soda with a little water to form a paste and then spread this mixture over the oven glass.

You can use vinegar if you want to enhance the effect by pouring it into a spray bottle and then spraying the resulting paste. Everything will foam and when the bubbles stop appearing, rinse the glass with a damp cloth.

Over time, all the grease and dirt will come off and the oven glass will shine again.

Clean the oven glass with ammonia.
Unfortunately, this remedy is not natural, but it is very effective on very dirty windows. Attention, it should not be used as part of daily cleaning, it should be saved for difficult and persistent stains.