JEAN PARROT wrote in a message to WAYNE CHIRNSIDE:

 JP>      Good morning, Wayne.

 JP>   and gently rub the contacts clean.  Works for me.

 WC> Hm, never occured to me but it's a no lose situation and
 WC> I do have three perfect units to fall back on.

 JP>   It is said that these contacs are gold plated to ensure that
 JP> there will be   no corrosion but the eraser use has been beneficial
 JP> here. Try it. 

Gold will inhibit corrosion,  but it's no more immune to contaminants than
any other material...

---