Port Lubrication--Pros and Cons?

[Stephen Mackenzie]

I just got an oldish iBook (500MHz 2xUSB). Yes, it has a squeaky hinge 
but everything works for now... But every day I'm plugging in the modem 
cable, power cable and USB things--and unplugging them again. This is 
going to continue because it is a portable and I intend to use it that 
way.

Does the list have any thoughts on whether it would be a good idea to 
lubricate the machine's sockets to reduce wear, and if so, what 
non-smelly, non-conductive substance would work the best?

SM.