How to fix a scratchy / crackling volume knob & switch on an active speaker (amplified speaker)

How to fix a scratchy / crackling volume knob on an active audio speaker.
Amplified speaker.

[@rohmatbubut-um4ug]

Terimakasih sering saya mengalami kesulitan untuk benerin volume di efek guitar ,jadi jalan keluarnya saya harus beli dan ganti volume yg baru ,ini saya banyak terima kasih atas berbaginya ini sangat bermanfaat sekali pak ,, 🙏🙏🙏

[@zt7489]

Thx. I have a sub woofer that utters random noises when content is playing. Not the same thing as crackling when turning pots. Do you think the cause could be the same thing, pls?