Wiper pivot arm bushing replacement???

Actually, they tend to pop in better when warm, not cold. At least that's been my experience in the past.

I fill a can with scalding hot water and drop the bushings in it for a few minutes (use a pair of needle nose pliers to retrieve it) and it will pop right into the linkage/arm with just 2 fingers pushing on it.

Dry it, put your grease in (and while it's still warm), install it in the car.

Easier than pinching your fingers with a pair of channel locks, been there before, used to install bushings that way. Always seems that when you've "almost" got the bushing in, the channel locks slip off the bushing and wack... pinch the tips of your fingers between the handles :D