the clacky noise is normal, be aware that the motorized faders are cheap ass plastic and very fragile, don't push them hard. I bought mine and the master fader was broken. It's not hard to disassemble if you take off the bottom.
I dont think lube is your problem unless they are sticking. Just be aware they are very fragile. If you open up a fader you'll see. I epoxied the broken piece in the fader and got it working perfectly again.
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