If the printer’s outer case is dirty or dusty, turn off the printer and clean it with a soft, clean, and moist cloth. If you cannot remove the dirt, try cleaning with a soft, clean, and moist cloth moistened with a mild detergent.
Be careful not to get water onto the printer mechanism or any electrical components. Otherwise, the printer could be damaged.
Never use alcohol or paint thinner to cleanthe components and the case. These chemicals can damage them.