I will never have a use for hardening hair spray, dry shampoo or mouse. My hair already has too much volume and doesn't get washed enough for hair spray. (Seriously, what would it even do for natural hair? That's why we have gel) Dry shampoo to me is for people who want to get rid of some greasiness but don't have time for a real wash. I don't get greasy unless I'm heavy handed with the grease, even then a cowash could handle it. Mouse, nah. I've got enough volume. If I need more definition, I'll try conditioner and gel. What don't you use and why?