Grip and sliding

Do you need grip aid, is there a reason why you use it? No every one does. Unless you have hands that sweat so much you slip then grip aid on the hands isn't needed.

I use grip aid sparingly. Usually when learning new moves, specifically inverts or when the weather is funny and I can't seem to do anything. My hands and feet sweat regularly and I have learned to grip through the sweat, unless I am dripping wet all over I usually cam pole through it and just use a microfiber cloth or towel.