How I finally found the best hair perfume after wasting money on the pretty ones
Went through gisou, ouai, and a byredo hair mist over about eight months, all beautiful, all gone within two hours, all priced like that was acceptable. The throughline was that every expensive option I tried was essentially just a light EDP in a smaller bottle with a story about hair care attached to it. Nice scent, zero function beyond that.
Started paying attention to whether anything addressed the odor absorption problem rather than just layering fragrance on top of it. Hair picks up everything, cooking smells, smoke, that specific subway air, and most options just add a pleasant scent on top of whatever's already there. Some brands like kitsch have odor eliminating technology built into the formula rather than just fragrance, which is a genuinely different product from everything else in the category. Once I understood that distinction the whole market made more sense, most of what's out there is scent delivery, a smaller number of products are actually doing something functional on top of that.
Still have my gisou for days when I want something that feels more luxurious in application. But for daily use the kitsch warm sugar does more for less and that's hard to argue with once you've noticed the difference.