So i finally ordered some creapure creatine, and in the meantime I found some old ass gnc creatine mono that I was going to use just to load with since it's been years since I've used any creatine. I put some in a cup with water, mixed it up and it doesn't mix worth a ****. I tried drinking it, but it's all gritty and most of it just stays on the bottom and doesn't mix..... Am I missing something or is this semi-common or what?