Refrigerate
Peanut Butter? Not to be snarky, but... what color is the sky on
your planet? I've been eating the stuff for over 60 years, now (and I'm one of those weirdos who eat it with a spoon, right out of the jar), and my peanut butter has
NEVER been refrigerated; not ever, never. I just spent the last minute scrutinizing my current jar of Skippy creamy peanut butter (almost gone, too - will be, before today is over), and
nowhere does it say "Refrigerate after opening", or any nonsense like that. My jar of Costco store brand "organic, pure & natural" peanut butter, though? The kind I constantly have to stick a blender into, to get everything mixed back together? Yeah, that junk
does say to refrigerate it... Personally, I say throw that kind of P-Butter the Hell out, and get more Skippy (or Peter Pan- that's good, too)...