Clean your desk booking screen using a 70% alcohol (ethanol) spray. Do not use a product containing bleach.
Spray the liquid onto the screen face only and use a soft cloth to gently wipe over the whole unit. Be careful not to get liquid in the small hole on the top edge of the unit or any other openings. Alternatively, spray the liquid directly onto a cloth and then wipe the unit. Frequent cleaning in this way will not damage the screen.
Surface wipes impregnated with a synergistic blend of bactericides, surfactants, and alcohol can also be used.