How to Prevent Oven Door Shattering and Why Do They Happen?

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## How to Prevent Oven Door Shattering and Why Do They Happen?

It’s a typical evening—you’ve preheated your oven for dinner, only to be startled by a loud *boom* followed by shattered glass all over the kitchen floor. If this sounds like a scene out of a kitchen horror story, you’re not alone. Oven doors shattering, while rare, **do happen**, and understanding the reasons behind this surprising occurrence can help you prevent it.

### Why Do Oven Doors Shatter?

Modern oven doors are made of **tempered glass**, which is designed to be heat-resistant and strong. Tempered glass is made through a rapid heating and cooling process that strengthens the glass, but it also gives it one notable property: if it breaks, it shatters into small, blunt pieces rather than sharp shards.

However, despite its strength, tempered glass can still break under certain conditions:

1. **Microfractures or Hairline Cracks**
Small scratches or chips on the surface of the glass—caused by cleaning tools, utensils, or accidental bumps—can weaken the glass over time. These microfractures may expand with repeated heating and cooling, eventually leading to a sudden shatter.

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