How often are the handrails/poles in NYC subway cars cleaned?

How often are the handrails/poles in NYC subway cars cleaned?

• Answer:

  A New York Times article from 1999 quotes an MTA spokesperson that says each train is cleaned every time it arrives at its terminal location, up to 6 times per day: ''New York City Transit has a firm commitment to provide the riding public with clean subway cars,'' said Bob Slovak, an agency spokesman. ''Every time a train gets to a terminal location, a cleaning is done,'' he said, which comes out to an average of about six cleanings per train per day. ''It's mopped,'' he explained. ''They take a rag and wipe it down.'' That's the most recent reference I could find on the matter. http://www.nytimes.com/1999/02/11/nyregion/subways-are-a-grimy-way-to-go-straphangers-survey-finds.html