Oven doors can shatter mainly because of the type of glass used and small imperfections within it. Most ovens are made with tempered soda lime glass, which is less resistant to sudden temperature changes, while others use stronger borosilicate glass.
Tiny flaws in the glass, such as nickel sulfide inclusions, can lead to sudden breakage. This risk is higher during high-heat cycles like self-cleaning, when the glass is exposed to extreme stress.
To avoid accidents, it’s important to handle oven doors gently. Don’t place heavy objects on them, and avoid using harsh scouring tools that can weaken the surface. Also, make sure that dishes inside the oven don’t press against the glass.
By taking simple steps—like cleaning with soft tools and preventing temperature shocks—you can greatly reduce the chances of the glass breaking, keeping your oven safe and in good condition.