Lock cylinder doesn't like cold

[Byrd91]

My 92 drivers side lock cylinder doesn't like to turn (not hard, just doesn't) when it cold. It did it last winter and is starting to do it this winter. I WD-40d it so we'll see if that helps, any ideas?

 

[88vert]

Take it to a locksmith and have them rebuild it,mine was doing the same thing for the lsat two winters and last week the key broke off in the door

 

[dwnthehatch]

Both my door locks on my 98 just started doing it. I thought my key was worn out. I sprayed some silicone lubricant in the key hole and everything works fine again.