Sometimes when your ceiling fan become slow probably it happens because of a bad capacitor. Once capacitor stop working power can’t transform to the motor.

You can found a capacitor from here and replace it according to the wire color. Higher capacitance will make your fan spin faster but don’t simply replace later your fan fly away🤣

Radiotronic sells alot of audio stuff too but I wanted to mention they do sold fan capacitors haha because I really don’t know where can I find this in KK