I just acquired a Mackie Control. Works great except for 2 channels whose faders are slightly sticky. I've tried to find a consensus answer as how to clean them. I've came across a product by Deoxit called FaderLube, but I've seen contrasting opinions on if this should even be used on the motorized type P&G faders found in the MCU.


It seems the MCU is pretty popular...anyone around here have experience cleaning/maintenancing them?

If you have the newer MCU, you have the geared faders, a little deoxit should help. If you have the older string driven faders, make sure they're not slipping - if so, a little bit of belt-dressing will do.

Well it's an older MCU...definitely not the newer Pro model, so I'm guessing they are string driven. Sorry to be dense, but what exactly would entail "belt-dressing"?

I have the same problem with my MCU.  I am now looking for a newer device as a midi controller for Sonar.   I only have one fader that sticks and it stays up above unity until I am not longer in the project.
 
Peace

Belt-dressing is used to provide a bit of traction on belts 
 
You might try a bit of this...
 
http://www.mcmelectronics.com/product/20-5420
 
They also carry rubber rejuvinator which works great on rubber belts. I used to use the stuff all the time when I was an offset print press operator (in another life...).

Ah ok so it literally is called belt dressing :). I'll check it out...thanks!
 
Is it something I can just apply a few drops through the slot, or do I need to take the whole thing apart and apply manually?

No - DO NOT drop through the slot or whatever - you don't want to get that stuff into the faders! 
 
You just want a little of dressing on the belt or string. It's pretty likely you will have to remove the bottom cover to get at the back of the fader. You can put a little bit of belt dressing on a cotton swab and gently swab a tiny bit on the belt. But don't get it (or anything else) into the fader - that would ruin them. They only thing you can use on the faders themselves is deoxyit, to remove any gunk or loose carbon material. If you do this - clean the faders with deoxity first and let dry - then apply a bit of belt dressing to the strings only.