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Oftentimes, we hear warnings about the dangers of putting metal objects in a microwave. We are told that it can cause sparks, fires, and even damage to the appliance. While it is true that certain types of metal should never be put in a microwave, there are also some unexpected benefits that can occur when you do.

First, let’s start with the basics. The reason why putting metal in the microwave is usually not recommended is because metal is a conductor of electricity. When metal is exposed to the microwave’s electromagnetic field, it can create an electric current which can lead to the aforementioned sparks and fires. However, not all metals react the same way in a microwave.

Thin, smooth metal items such as aluminum foil or utensils are more likely to cause problems because they can create a concentrated electric current. However, thicker or more crinkled metal objects like a spoon or a fork, can act as an antenna and distribute the current more evenly, causing less damage. Therefore, while it is still not recommended to put metal in a microwave, not all metals will have catastrophic results.

So, why would you even want to put metal in the microwave in the first place? It turns out, there are a few instances where it can actually have some positive benefits.

One of the most surprising uses for putting metal in a microwave is for disinfecting sponges. Sponges are notorious for harboring bacteria and microbes, even after they have been washed. However, microwaving a damp sponge for two minutes on high can kill 99.9% of the bacteria living inside it, according to a study published in the Journal of Environmental Health. The study found that microwaving the sponge can be just as effective as using bleach or dish soap, and it’s a much more convenient option.

In the same vein, microwaving metal can also be used as a sterilization method for other kitchen items, such as cutting boards or kitchen cloths. This can be especially helpful for households with young children or individuals with weakened immune systems.

Another benefit of putting metal in the microwave is for faster and more even cooking. If you have ever been in a rush to get dinner on the table, you may have looked for ways to speed up the cooking process. Placing a piece of aluminum foil on top of dishes can act as a conductor, helping to evenly distribute the heat and cook the food faster.

Additionally, using metal skewers for kabobs can also help to cook the food more evenly. The metal conducts heat, allowing the heat to reach the center of the food while still providing a crispy outer layer.

In the realm of science experiments, putting metal in a microwave can also yield some interesting results. By placing a grape cut in half, with just a tiny piece of skin connecting the halves, in a microwave, you can create a plasma arc inside the grape. This is a result of the electromagnetic field interacting with the moisture in the grape, and it is a fun and safe way to explore the properties of microwaves.

In conclusion, while it is generally not recommended to put metal in a microwave, there are certain scenarios where it can have positive benefits. From sterilization to faster cooking times, and even some fun science experiments, microwaving metal can be more than just a safety hazard. However, it is important to always use caution and follow safety guidelines when experimenting with metal in the microwave.