Well I used to use old spice deoderant religiously, but then I began to get itchy under my arms. I switched to another, and had the same problem. I looked for a common ingredient (I think it was polythylene), and found one (degree) that didn't have it. It was fine, but they didn't have an unscented one when I looked. Has anyone else had this problem? What do you use? I've heard some people use an alum block, would this work?