I've just acquired a Behringer XENYX X2222USB, it's a bit grubby, and some of the pots and sliders are a bit crackly.
I'm quite practically minded and would like to take it apart, taking photos along the way to ensure I put everything back properly, and give everything a good clean with compressed air cans etc.
I was told by the previous owner that the mixer works as it should, but is just a bit crackly on some channels.
So my question is: After doing all this, will all the crackles disappear, or am I wasting my time trying to restore it to working order?