Although using an electric kettle to boil water is very simple, many people still make common mistakes that shorten the lifespan of the appliance and may even harm human health.

Many households rely on electric kettles because of their convenience. All it takes is pouring water into the kettle, switching it on, and waiting a few minutes to get boiling water for immediate use.

However, despite their ease of use, electric kettles are often used incorrectly. These mistakes not only reduce the durability of the kettle but can also pose safety and health risks. Below are five common mistakes—so common that 9 out of 10 households are believed to make at least one of them.

1. Thinking Any Electric Kettle Will Do

The primary function of an electric kettle is to boil water, so many people assume that all kettles are the same. As a result, they choose cheaper models as long as the kettle can boil water. In reality, the material of the kettle is extremely important.

When buying an electric kettle, it is best to choose one made from stainless steel, particularly 304 stainless steel. This type of steel offers excellent corrosion resistance and can withstand high temperatures. Kettles made from 304 stainless steel are considered food-safe and help ensure that boiled water remains free from harmful contaminants.

Using low-quality materials may lead to metal leaching when exposed to high heat, which can negatively affect water quality and long-term health.

2. Filling the Kettle with Too Much Water

Many people have the habit of filling the kettle to the brim. However, this practice carries hidden dangers. When water boils, it can overflow and seep into the kettle base, potentially causing short circuits or electrical damage.

In fact, every electric kettle has a clearly marked maximum water level on the inside wall. For safety reasons, water should never exceed this level when boiling, as it helps prevent electrical hazards and prolongs the life of the appliance.

3. Turning on the Power Before Adding Water

Some users turn on the kettle before pouring water into it, especially when adding water with a separate container. This habit can seriously damage the kettle.

If there is no water inside, the kettle enters a dry-boil state. Although each dry-boil incident may be brief, repeated occurrences can burn the heating element, damage internal components, and even cause electrical short circuits.

To use an electric kettle safely, always add water first, then place the kettle on its base, plug it in, and switch it on. Additionally, before placing the kettle on the base, check for any water on the base surface. If moisture is present, wipe it dry to prevent short circuits. After each use, unplug the kettle for added safety.

4. Pouring Out All the Water After Boiling

After boiling water, people often pour all of it into a thermos or water bottle for later use. However, it is better to leave a small amount of water inside the kettle.

The reason is that when the kettle has just switched off, the base remains hot. Pouring out all the water immediately can cause the thermal relay to dry out, which may affect its performance and shorten the kettle’s lifespan.

Ideally, leave a little water inside after pouring. Before the next use, discard the remaining water and rinse the kettle. This simple habit can help maintain the kettle’s durability and prevent premature damage.

5. Rarely Cleaning the Electric Kettle

Regular cleaning of the kettle interior is essential. If limescale is not removed over time, it gradually forms a yellowish layer at the bottom and sides of the kettle. Using a kettle with heavy scale buildup not only affects water taste and quality but may also pose health risks.

To remove limescale, pour white vinegar into the kettle and add about half a bowl of water, then boil the mixture. After the water boils, let it sit for around 10 minutes, then pour it out. You will notice that the scale has significantly loosened.

Next, wipe the interior with a clean cloth, and the remaining residue will be completely removed. Vinegar works effectively because limescale is alkaline, while vinegar contains acetic acid. The acid–base neutralization reaction helps dissolve and eliminate mineral deposits.