2. Faster dirt and bacteria buildup
Leaving the door open exposes the microwave interior to dust, grease, insects, and airborne bacteria. This can contaminate the inside and, in turn, the food you reheat later.
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In humid areas or kitchens with lots of cooking vapors, this exposure can even encourage mold growth.
👉 Tip: Air it out briefly, then close the door to avoid contamination.
3. Possible damage to the appliance
Microwave door hinges are designed for repeated opening and closing, not to stay open for long stretches.
Keeping the door open constantly can strain the hinges and locking mechanism, which might lead to malfunctions or even safety issues over time.
👉 Recommendation: Always shut the door when you’re finished using the microwave.
