How to Clean and Dust Your Radiator

October 17, 2025, 9:52 am | Read time: 2 minutes

When thick dust balls appear between the crevices of a radiator, it’s time for a thorough cleaning. Although removing dirt and dust may seem tedious at first glance, a clean radiator operates more efficiently, saving energy and heating costs. myHOMEBOOK explains how to thoroughly clean even hard-to-reach areas in joints and grooves.

How to Clean a Radiator

It’s best to place a slightly damp cloth or newspaper under the radiator before cleaning to catch falling dust balls, dust, and insects. Additionally, the German Cosmetic, Toiletry, Perfumery and Detergent Association (IKW) advises letting the radiator cool down beforehand.

For many radiators, a brush 12 to 16 inches long or a radiator nozzle on the vacuum cleaner is usually sufficient. This allows you to reach the outer corners and the back of the device. The more accessible outer surfaces are additionally cleaned with water and an all-purpose cleaner.

Tip: It’s better not to use sponges with a hard scouring layer to clean the radiator. They could scratch the paint.

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Step-by-Step Radiator Cleaning

Turn off the radiator: First, turn the thermostat all the way down.
Clear the area: Now, clear the area around the radiator.
Cover the floor: An old towel on the floor catches falling dirt.
Remove the cover: If possible, remove the cover or the heating grille located on top of the radiator.
Vacuum the radiator: Use the vacuum cleaner to clean the radiator of coarse dust and dirt.
Brush the fins: Dirt stuck in the gaps is best tackled with a radiator brush.
Wipe the radiator: After dusting, use a damp cloth to wipe the surface of the radiator.
Reattach the cover: Then you can reattach the grille.

Why Do Radiators Collect So Much Dust?

Radiators and the spaces between the fins collect a lot of dust because the warm air constantly circulates, carrying dust particles that settle on the surface due to heat, dry air, and a slight electrostatic charge. You can also find dust balls and dead insects. Since radiators stir up air, they also release dust and dirt particles into the environment. This can irritate the respiratory system and eyes, explains the German Cosmetic, Toiletry, Perfumery and Detergent Association.

Note: The thicker the dust inside the radiators, the less efficiently the heat is distributed. Therefore, they should be cleaned regularly.

This article is a machine translation of the original German version of MYHOMEBOOK and has been reviewed for accuracy and quality by a native speaker. For feedback, please contact us at info@myhomebook.de.