No wonder it's so clean.

Fewer than 6,000 riders a day are using the new $2.4 billion 34th Street-Hudson Yard station on the No. 7 line, officials said Monday. The MTA had projected that as many as 32,000 people daily would use the serene far West Side station, which opened in September.

Joe Leader, a senior vice president at the subways department for New York City Transit, said 5,900 riders have been using the stop on average a day. This includes both entries and exits, according to a spokesman.

However, thousands of costumed comic book, sci-fi and superhero enthusiasts gave the new stop a test-drive when they packed into No. 7 train cars for the four-day New York Comic Con at the Jacob Javits Convention Center. Between Oct. 8 and 11, the station averaged 18,300 riders a day.

"Our subway service to the new Hudson Yards stood the test of the sold-out Comic Con, when thousands of spirited and superhuman passengers took to the 7 line and to the Javits Center," Leader said.

The MTA said ridership will likely improve when a High Line entrance that is closed right now is reopened.

The Hudson Yards area, which is under construction, will have 50 million square feet of new development -- including 20,000 apartments and 2 million square feet of stores.