How to clean the exterior of an amp?

What do you think is on amps exterior that you are tempted in trying to clean off?

If you are talking of dirt and grundge - I use WD40, a small cloth and elbow grease. Do not spray on, wipe on & off. I use this on stainless steel and aluminum - not painted surfaces.

I have chrome finished amps so I can use Brasso (put onto cloth & never directly onto amp). Some elbow grease & the thing shines!
Previously for matt finished amps, I used a damp cloth for simple finger prints, 71% alcohol for greasier marks. Then to finish off, a bit of Pledge on the face plate & 1-2" on the top panel & side panels! Yields a high-gloss finish. Of course, use Pledge sparingly & again put onto cloth & never on amp directly. Avoid the heat fins, vent slots & the rear panel.

I use the rubbing alcohol on a clean cloth as per Levinson gear manuals. It seems to work great and leaves no residue.