Clothes on the radiator are dried this way to avoid humidity

If clothes don’t dry properly or too quickly, they can develop a musty smell. This happens when the moisture doesn’t evaporate fast enough, leaving clothes damp for too long.
Overheating Clothes:

Direct heat from the radiator can sometimes damage delicate fabrics or cause clothes to shrink or lose their shape.
Straining the Radiator:

Placing heavy wet clothes on a radiator may cause the radiator to overheat or even malfunction, as it’s not designed to support the weight.
Tips to Avoid These Issues:
Increase Ventilation:

Open a window slightly to allow air to flow through the room. This helps prevent humidity buildup and encourages faster drying.
Use a Drying Rack:

If possible, place a drying rack next to the radiator (rather than directly on it). This allows air circulation around the clothes while benefiting from the warmth of the radiator without overloading it.
Turn on a Fan: