YouBike Sweet Notice

'YouBike' is a public bicycle sharing service in Taiwan.

On the dock of YouBike, it says:

YouBike Sweet Notice

For your own safety, please check bike's condition first before you go. ( Ex: Breaks, Tires Pressure, Lights, Seat Clamp), Please do not rent the broken YouBike and turn the seat backwards to indicate it needs repairs.

When returning YouBike, make sure the bike is locked properly on the dock. After the blue light on the dock blinks and emits a beeping sound, please use your card on the sensor pad on the dock to pay the rental fee. When the indicator light switches back to green, the return process is completed.

The bikes are covered by Product Liability Insurance and Public Liability Insurance only in the station area. For additional coverage you must take out insurance yourself.

Does the phrase 'sweet notice' sound natural? and is there anything in this article sound unnatural?

Thanks!