Questions regarding pocket pairs and limping in from later positions

[Bigjim26]

I'm working on plugging some leaks in my game.
I'm curious how you handle pocket pairs
UTG I raise any pockets AA-77 and fold 22-66.
Is there any time lets say CO or Button I should limp with a pocket pair?
Also should I limp in CO or button w/ hands such as
K9s, Q9s, J9s, T9s, Axs??
It was pointed out one of my mistakes was limping w/ hands UTG. I've corrected that I either raise or fold UTG but I'm still not sure how to deal w/ certain hands in CO and Button.

Any help would be greatly appreciated.
James