If you can remember to do it, take the jar out of the refrigerator ahead of time and let the peanut butter warm up a bit. That may help.

A couple of jars ago, I made a mess during the initial stir. A lot of oil spilled out and the pb was fine without it. So last time, I poured out some oil into a small jar, and carefully mixed the remainder. I have used some of that "extra" oil for cooking, but I'm saving it in case the peanut butter gets too dry. I've been on a peanut butter kick lately.