You can return your bike to any station with an open dock – you don't have to bring it back to the station where you picked it up. Use the slider on the top left of the map screen to toggle between available docks.
Tap on a station to see the exact number of bikes and docks available. Line up the triangle located at the front of the bike with the dock and insert your bike gently but firmly- don't slam it! Wait until the light on the dock turns green to make sure it's locked. If you aren’t sure, pull the bike by the handlebars to confirm it’s properly locked.
If holding the bike and pushing from the handlebars isn’t working, some people find it easier to push it in by the seat, while holding only one handlebar to guide the bike. If you hear a grinding noise, sometimes jiggling the handlebars slightly, or pushing from the seat, will allow the bike to be docked properly.
Please always make sure your bike is docked at a Citi Bike station when your ride is over; never leave it unattended.