The power button on my smartphone (Samsung Galaxy Note) stopped responding after carelessly using the phone outside on many rainy days. It would not come back so over time I got used to alternative tricks to turn on/off the display as well as the device as a whole.
After a year or so of using these workarounds, I noticed a few days ago that the button miraculously started working again. I would like to restart using it normally but I'm afraid it might now be in some fragile state I could easily break for good.
Is there a simple and safe way of cleaning the button (with its contacts inaccessible within the phone) and protecting it for the future? Like letting a small drop of engine oil through the hole around it? Obviously I don't want to break my phone by pouring something conductive into it but I don't want to accidentally cover the contact areas with some insulating film either. Just something that would remove the remaining bits of rust if there are any.