One of the first things to check is the interior of the kettle. White or chalky deposits are usually mineral scale caused by hard water rather than rust. Although limescale is generally not dangerous, thick buildup reduces heating efficiency, increases energy consumption, and may shorten the appliance's lifespan. Fortunately, scale can usually be removed safely by boiling a mixture of water and white vinegar or using a commercial descaling product according to the manufacturer's instructions.

More concerning are signs of corrosion, peeling interior coatings, or damaged metal surfaces. If the inside lining begins to flake, chip, or rust, tiny particles may enter the water. While occasional exposure is not necessarily harmful, manufacturers generally recommend replacing appliances that have deteriorating food-contact surfaces.

Another warning sign is damage to the power cord or electrical base. Frayed cords, loose plugs, scorch marks, or overheating during operation increase the risk of electrical shock or fire. If you notice any of these issues, stop using the kettle immediately and replace it rather than attempting unsafe repairs.

Water leaking from the base or around the seams is another indication that the kettle may no longer be safe. Leaks can allow moisture to reach electrical components, potentially causing short circuits. Likewise, a kettle that fails to switch off automatically or boils continuously may have a malfunctioning thermostat that requires replacement.

Many alarming online posts claim that old kettles "cause cancer." In reality, reputable health organizations have not found evidence that certified household electric kettles cause cancer when used as intended. Most stainless steel kettles are manufactured using food-grade materials designed for repeated heating. The greater concern is purchasing extremely low-quality products that fail to meet recognized safety standards or continuing to use visibly damaged appliances long after they should have been replaced.

Proper maintenance can significantly extend a kettle's lifespan. Empty unused water after each use, descale the interior regularly if you live in a hard-water area, avoid overfilling the kettle, and never immerse the electrical base in water. Cleaning according to the manufacturer's recommendations helps maintain both performance and safety.

When purchasing a new electric kettle, choose one from a reputable manufacturer that meets recognized electrical safety standards. Features such as automatic shut-off, boil-dry protection, and food-grade stainless steel interiors provide additional safety and convenience. Reading user reviews and following the manufacturer's care instructions can help maximize the appliance's useful life.

Ultimately, an electric kettle remains one of the safest and most convenient kitchen appliances when it is properly maintained. Rather than relying on sensational headlines, focus on evidence-based safety practices: inspect the kettle regularly, clean away mineral deposits, replace damaged appliances promptly, and purchase products from trusted manufacturers. These simple steps will help ensure safe, efficient use for years to come.