David Katsuki wrote:

>   Scraping the pins and the contact pads
> makes the connection good again for a while,

Have you tried to cover the contacts with some Vaseline or grease? This should
keep the corrosion away for some longer, and you only need a thin layer, just to
"wet" the surface. I've tried it successfully on a cell phone(!), it might do
the trick.

PerL
88 Syncro
Arendal, Norway