Certain Dri not working!?

I don't understand... I bought certain dri almost two weeks ago and I have been applying it every night just as the instructions tell you to. I sweat really bad and was almost sure certain dri would work because so many people say that it works wonders. Does anybody have any tips or tricks that you found while using certain dri to help make it work. Do you think i should buy the AM solid refresher? Right now I only have the roll on. Any advice would be wonderful, thank you guys!