Once upon a time when there was radio shack, they sold a spray circuit cleaner that was good for dirty pots. May be something you can find at Amazon or New Egg.

Thanks. Ordered a can. Should be coming in today. In the meantime, does anyone know how to remove the volume and mic level knobs? Im trying not to break them. Twisting them counter clockwise doesn't seem to work and pulling them out isn't working either. Well, at least im trying not to turn and pull too hard and break it if that's not how it's supposed to come out. Thanks

DON'T turn them.

They're either a push fit (if plastic) or will have a tiny locking screw (if metal) but they should just pull off.
They could be tight though, so maybe some gentle levering is required.

Thanks Karyn,

I was looking for the metal screw but there is none. I was trying to pull out and maybe I was being too gentle. I'll try again. Hoping someone from presonus can chime in to let me know exactly. Thanks!

It may be easier to spray the cleaner form the back of the unit. Take the back panel off. Or you could from the top with the knobs on. I think it will seep in.