X1850 Faders

So just noticed channel 1 is bleeding when the fader is set to the down position you can hear low audio coming through.

Has anybody Attempted to replace the faders themselves yet.? Mixer is out of warranty so will cost regardless.

Any links to purchase the faders would also be good.

Before I would start to disassemble the hardware I would first try with contact spray. This is what everyone would do in a workshop first. Also compressed air could be useful. There should be tutorials how to do this the best way.