Every office has I.T equipment, yet not every office cleans it. Despite the fact studies show an office keyboard can have 4 x as many germs as a toilet seat.
While your monitor may not be one of the pieces of equipment you touch the most, the germs can still really build up. Coughing and sneezing as well as general dust can settle on the monitor over time.
To avoid this, use a clean microfibre cloth with a disinfectant to kill the germs and your monitor will be fresh as a daisy.