what? its probably bad if u grind it up and put in a plastic bag, but if u put it in an air tight jar, who cares?

I grind my oz up everytime i buy one, then i put it all in my mason jar. Its just easier, and faster. I just grab my weed and pack it...i dont notice any THC being wasted.

AND you should see my coffee grinder cap, it collects soooooooooooooo much keif, some of you are missing out.