Windstar :: 2001 - Electric Rear Vent Windows Won't Open When Cold Outside

My electric rear vent windows seem to have a problem opening when the temperature is cold outside. They work almost perfectly when the weather warms up, with the exception of an odd little glitch here and there. Generally summer is good, winter is a no-go. I understand this is a common problem ???

Even at the times when they don't open I can clearly hear an electronic click near the back pillars, with each push of the control switch up front, so I assume the current is making it at least that far and there is no problem with the wiring up to that point.

I have recently removed two used actuators (R+L) from a donor vehicle, and will likely be installing those into my van in the very near future. Although I believe they came from a close but different year windstar which did not have the exact same "rivets" through the window as mine does. External arms etc that can be seen do look identical as does the pivot ball.

#1. is replacement of the actuators a likely solution to the problem ?
#2. by chance, is it merely just an issue of dirty connections with my present actuators ?
#3. can / should I do anything such use dielectric grease on the connections of either my present ones or the donor ones upon replacement, to alleviate future recurrence ?