I recall a similar thread some years back… a topic that often leaves me rather uncomfortable with some of the remedies provided.
Do not use those micro fibre cloths that come in various colours and packs of three or so. They are generally poor quality and actually quite abrasive, particularly on piano gloss finishes. They ONLY one that I will place anywhere near my kit is the one from Addis that is a very bright orange with a clear label on it that says “feel the difference”. It’s more expensive than the others, around R60 a cloth if I recall. I keep a bunch of them in a small basket and move them to another after each use. Once all used once, I wash and tumble dry them to keep them clean and soft. Photo added for clarity.
I’ll use one of these cloths very lightly misted with a solution of distilled water and around 20% isopropyl alcohol. I don’t agree with isopropyl neat, as it can remove indicator markings on some equipment and so damage to certain finishes and coatings if not careful.
Once clean and almost instantaneously dry from the above, a new cloth misted with a good quality auto-detailing spray such as Meguiars Ultimate quick detailer. It dries quickly without leaving streaks, and provides protection for your kit against the elements. The sealed result also greatly improves the ease of cleaning in the future, as fingerprints or dust will wipe off more easily and therefore not contribute easily to swirl marks.
Don’t use silicone based cleaners. These include products like Sheen or Mr.Min or Dash. As nice as it may look initially, you are doing nasty things to paint finishes and plastics over time. Silicone is a lubricants and protector - yes. But it also saps into it any natural waxes found in plastics and paint finishes, leaving finishes dried out and dull when cleaned off.
If you don’t have isopropyl and distilled water available, a light misting of glass cleaner is also okay, but just enough to allow the dust to stick to the cloth as you wipe, and not enough so that the kit is left wet after.
This is my way that I have been using for many years, and with pristine results that have never damaged anything, and always kept my kit looking like it is brand new.
I hope this helps someone, and if it does please let me know what you think of the results! 
