Of course it can go bad, just like weed can go bad. Takes a long time though.

Especially if it's in a dark place or a closed container, it might change color or smell but it'll still give results. My girlfriend hasn't smoked for years and we found a roach in an old jar. I put it in a pipe and got ripped...

Consider it "aged" like a fine wine!
DRybes Reviewed by DRybes on . Can kief "go bad?" I haven't used my grinder in probably 2 months. I completely forgot that last time i used it, i didn't clean the kief out of it. Now, when I pulled it out of my drawer the other day, there is a whole shitload of kief built up in there. Is it still good to use? Rating: 5