loose IEC power cord connection?

Black "electricians" tape is all you need. It's so bloody easy...just wrap a couple turns.

Nothing applied to the outside of the IEC plug does a thing to improve its connectivity. Just keeps it from falling out.

I think not falling out would help the connectivity everytime;^]

Okay, but put a Furutech IEC connector on your power cord and I'll bet you can hear the difference :-)

This is assuming that you can do this without miswiring, electrocuting yourself, burning the place down, or otherwise wishing you hadn't.