I agree with Gary on the Isopropanol (IPA), depends on how bad the spillage is and how much fluff and grime has been attracted to it. With the IPA, do avoid the capstan bearings & gears as it will dry them out. My favourite for this sort of thing is a foaming cleaner which lifts the grime out and does not attack oil-based stuff leaving your gear assemblies and bearings intact.
Make sure you clean the coffee off the PCB's too as left long-term this can cause problems.
You could IPA the whole thing (with no power attached :-) and then re-oil all the bearings etc but that's boring, the foaming cleaner can be fairly liberally applied, left to soak for a while and daubed off with cotton buds.
Coffee with sugar is not too bad, coke will often dissolve PCB tracking and motor parts.
Hope this helps?
G
Graham Arnott
March 2006