How too clean top/sides of black metal on McIntosh units


It is clean but has an uneven color which may be from hand oils from handling.  I tried putting some isopropyl alcohol on a microfiber towel and wiping but it doesn't take the unevenness out completely.  Is there a better safe cleaning agent?
ymc226
I tried the Magic Eraser tonight on two MC units and it cleared up the unevenness. I did dry the tiny amount of residual moisture immediately with a microfiber towel.  This seems optimal as it doesn’t add additional chemicals. Thanks. 
Residual Oil Remover.  ROR for short.  Made for camera lenses but works on anything I've ever tried it on, although I haven't tried it on painted surfaces.  
Thank you for all the replies.  I already have a Magic Eraser so will try that initially.
HI,
Damped magic eraser, or the likes.
Don't go mad slight pressure. Any moisture left wipe it off with a microfiber.
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