Cleaning metallic surface from fungus

I want to clean the surface from fungus and fingerprints which you can see on the photo. Have to do that without damage to the device. Water doesn't help...

What can be adviced?

 

A gentle scrub with isopropyl (rubbing) alcohol works for me, but be careful around mild steel as it can rust it. A wipe over with WD40 or equivalent afterwards would protect the metal and prevent further degradation.

Stone

 

Umm, that looks like rust. There's not much you can do apart from treating the rust, but that would mean destroying the paintwork.

You might want to open it up and clean that port off, though. If that is rust, you could use a fine steel wool (although it would leave some scratches probably). The alternative would be replacing the port.

Fungus on a metallic product, if it really is fungus, can be treated with a household fungus remover. Take the usual precautions when dealing with mould. Fingerprints, again, you can use whatever you'd use on a normal surface - kitchen surface cleaner for bog standard, greasy prints to an alcohol-based product as suggested for more stubborn (e.g. inky) prints. A cream cleaner with a slight abrasive property (e.g. Cif) should work, too.

 

you could also try "never dull" polishing wool, that stuff keeps it from rusting further and cleans up the area too. The downside is, that you would have to treat the whole area, since it'll probably affect any thin paint, too.