In today's Hi-Tech environment, computer equipment attracts dust and lint from the atmosphere - often due to static. This, combined with ink stains and finger marks, leads to a rapid deterioration in condition.
Left soiled these increase the danger of eyestrain due to impaired vision.
A build up of dust, grease, food particles and drink spillage are a risk to hygiene, reduce user sensitivity and become more prone to malfunction.
These especially can be a source of contamination and present a health risk due to cross infection.