An oven door shattering can be shocking, but it usually isn’t caused by a single impact. Oven doors are made from heat-resistant glass that expands and contracts with repeated heating and cooling, which can slowly build internal stress. Extreme conditions, such as self-cleaning cycles, uneven temperatures, or hidden manufacturing flaws, can eventually cause the glass to fail suddenly.
Everyday habits also play a role. Slamming the door, placing weight on it, using abrasive cleaners, or exposing hot glass to cold water can create tiny weaknesses that grow over time. While rare, shattering is often the result of accumulated stress, and gentle use, careful cleaning, and avoiding sudden temperature changes can greatly reduce the risk.
