Electric kettles are a staple in most homes because of their speed and convenience. Simply add water, press a button, and within minutes you have boiling water ready to use.

But convenience doesn’t mean foolproof. In reality, electric kettles are often misused in small but important ways. These habits may reduce durability, increase safety risks, and compromise water quality. Below are five common mistakes—so common that experts estimate nearly 9 out of 10 households make at least one of them.

1. Assuming All Electric Kettles Are the Same

Since every electric kettle boils water, many people believe there’s no real difference between models and opt for the cheapest option. However, the material of the kettle matters greatly.

The safest choice is a kettle made from 304 stainless steel, which is highly resistant to corrosion and tolerates high heat well. This food-grade material helps prevent harmful substances from leaching into boiled water. Lower-quality kettles, especially those made with inferior metals, may release contaminants when exposed to repeated heating.

2. Overfilling the Kettle

Filling the kettle to the top may seem harmless, but it can be risky. When water boils, it may spill over and seep into the base, increasing the chance of electrical damage or short circuits.

Every kettle has a marked maximum fill line inside. Staying below this limit helps ensure safe operation and extends the life of the appliance.

3. Switching It On Before Adding Water

Some people turn the kettle on before pouring in water, especially when filling it separately. This can be very damaging.

Without water, the kettle enters a dry-boil state. Even short dry-boil incidents, if repeated, can burn the heating element, damage internal parts, and raise the risk of electrical failure. Always add water first, then place the kettle on the base and turn it on. Also, make sure the base is completely dry before use, and unplug the kettle afterward for extra safety.

4. Pouring Out Every Drop After Boiling

It’s common to empty all the water into a thermos or container right after boiling. However, leaving a small amount of water inside the kettle is actually better.

When the kettle switches off, the heating base is still hot. Emptying it completely right away can dry out the thermal relay, potentially reducing its effectiveness and shortening the kettle’s lifespan. Leaving a little water inside helps protect the internal components. Before the next use, simply discard the leftover water and rinse the kettle.

5. Neglecting Regular Cleaning

Limescale buildup is a common issue when kettles aren’t cleaned often. Over time, mineral deposits form a yellow or white layer inside, which can affect both water taste and quality—and may pose health concerns.

An easy cleaning method is to add white vinegar and water, boil the mixture, and let it sit for about 10 minutes. After pouring it out, wipe the interior with a clean cloth. Vinegar works well because its acetic acid reacts with the alkaline limescale, breaking it down and making it easy to remove.