I know I read someone talk about it, but I'm just not entering the right search words or something. I have 8 pounds of *gritty* shea butter, and I know there is a way to fix that - something like melt to 160degrees, hold that temp for 20 minutes, then straight to freezer..... something like that. Can someone who's done it before tell me how to get the grit out without ruining anything?