loose IEC power cord connection?

I have used wood blocks under the bottoms of heavy A/C powercords. Or butyl rubber bottle stoppers.
Anso, (but messy) BluTack rolled out and pressed around the mating outer edge of the connection.
The messy part is when it it pulled apart. The Blutack stretches and is gooey.
I find I can clean it up using the Blutack to pick up itself until all is removed. Annoying but i do use Blutack like (cheap) stuff for antivibration control.

I also wrap the Female cord end of the IEC with Teflon plumbers' tape. About five or so turns makes the connection tight. (naturally if loose more, if already too tight, fewer)
Every one of my powercords also has the teflon tape on them.

If anyone is concerned about the lack of contact inside the IEC female plug, One can insert strips of material under the metal inside the plug.
So the metal box in the female plug is slightly pushed in (mainly near each center face) so the plug makes a more solid contact.
It may also make the plug much harder to push in.
I would use stiff paper, rather than wire, just to keep the chance of a loose wire coming out from under the sleeve and shorting the plug.

If one looki=s into the A/C connection from a wall receptical to an A/C plug.. One can see the connection between the two parts is a rather small area of contact.
The IEC connection is a rather large area of contact, as much as twenty times the area of contact. So.. if it is not making solid contact over 80% of the surface, it STILL is a better connection than a standard American A/C connection.