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Cleaning the inner part of the radiator is a bit more complicated: getting to the cracks is difficult, and in them a lot of dust accumulates.
The first step is to remove dust from the inside of the radiator. A very simple trick is to point a hair dryer in the slots of the radiator, to make all the residue fall on the cloth or on the paper grounding.
If you want to avoid using the two appliances, you can create a utensil to reach the most complicated areas. Use a long stick and attach a microfiber cloth to one end using adhesive tape.
Once the dust is removed from the radiator, it attaches to the tip of the stick a cloth soaked in water, vinegar and bicarbonate to remove dirt and other residues.
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