Over time you may experience a squeaky noise from the handle bar folding screws. This is due to the springs inside that are loosing the factory grease over time.
You can easily add a little WD-40 to get rid of the noise.
See video:
https://drive.google.com/file/d/1H6IGu67ZMSsJiLMSLy1n23JvVa2q6QOo/view?usp=sharing