Use it on top of the deodorant!
Ok I'm leaving the same review for the powder as I did for the deodorant because I really want people to know this haha: applying the matching powder on top of the deodorant works MUCH better than using either one alone. I think it's because you're getting the maximum amount of active ingredients on your armpits at once. I apply the cream then pat the powder on top. This has the added benefit of preventing the oils in the deodorant from staining my clothes because the powder absorbs them. For me this is the only way it lasts all day. Also, the cream+powder combination works a lot better for me than the previous spray+ baking soda deodorant on top combo that I tried.