I've got my heater core out and was thinking about properly lubricating the cables. What's the best way? I was hoping to take the cables out of the housing but am worried that the cables will snap if I try to straighten the ends. Maybe just put a bunch of silicone lube in each end and move the cable back and forth.

i have done rc boats and the drive cable needs to stay lubed
i use marvle mistery oil and vasoline

mix in a small container and
put you cable end in and move back and forth