Bill acceptors accept and validate paper currency using optical lenses and magnetic sensors. Bill acceptors can be found in a variety of models such as banknote acceptors, payment kiosks, self-checkouts, bill validators, vending machines, slot machines, safes, ATM deposits and counterfeit detectors.
By not cleaning, you risk increased:
Hidden costs of service
Costs due to equipment replacement, and parts and service expenses
Manpower associated with "broken" equipment
Annoyed clients due to "broken" equipment