3 Replies Latest reply: Jan 30, 2011 8:25 PM by S.U.
James Thomson Level 1 (85 points)
Hi. There is white corrosion build up on the plug in sight of my iMac power book for the magnetic plug of the the charger/power adapter. What should I use to clean this off?

iMac, Mac OS X (10.5.1)
  • S.U. Level 6 (8,360 points)
    To be clear, do you mean the power port on the Mac or the plug on the power adaptor?

    For either one, I think I would initially try cleaning it dry, using something like a bit of microfiber cloth wrapped around a tooth pick and see if you can gently wipe away the white coating. The contacts are gold plated, so nothing should really adhere to them. If there is debris in the power port attracted by the magnet, you may be able to collect it with something like a clean dry QTip. I would avoid using anything metallic or conductive, and would also avoid using any kind of liquid. If cleaning the power adaptor tip, be sure the adaptor is not plugged in.

    Good luck!
  • James Thomson Level 1 (85 points)
    Thank you. You answered my question because I was wondering about alcohol, but that is liquid so I will avoid it. Yes, this is the port directly on the side of the Mac laptop. I'm guessing this corrosion is appearing because I had a bad liquid spill into it 6 months ago. Amazingly, the unit is operating just fine except that for some reason the finger pad doesn't work correctly but it's okay with a wireless mouse. The spill was toward the front, not the back of the keyboard surface, but I don't know how else to explain the appearance of white corrosion crud type of stuff around the plug port. I'll try the micro fiber material on a toothpick. Thanks.
  • S.U. Level 6 (8,360 points)
    It's safest to try to remove the corrosion dry to avoid any possibility of liquid wicking into the port and possibly making things worse. There are also many liquids you would not want to use as you don't want to damage any of the plastic parts of the port.

    If you cannot wipe the corrosion away dry, then you could barely dampen the microfiber cloth with a tiny bit of isopropyl alcohol and try that. It's important that the cloth be barely damp and not wet. If you do this, blot the microfiber almost dry with kleenex before using it. But clean it dry if you possibly can.

    Good luck!