10. Test on skin, but use cotton rounds too: For me, skin is still the best way to really understand a fragrance. A paper tester in a store is fine for getting a quick first impression, especially of the opening, but it doesn’t tell me the whole story. You really need skin to see how the fragrance develops on you, how it projects, and what happens once it gets into the heart and drydown. That said, I also like using unscented hypoallergenic cotton rounds as a secondary testing method. I keep them at home, and they’re easy enough to carry with me when I’m going somewhere to test fragrances. https://www.amazon.com/dp/B07VSBRRHD?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1 https://www.amazon.com/dp/B09542G9ZN/ref=vp_d_pb_cml_lp_B07VSBRRHD_pd?_encoding=UTF8&pf_rd_p=9c76da3e-1986-461f-80fe-90d97a5b2d1f&pf_rd_r=VFRVSXM184KT7GR79F81&pd_rd_wg=xHrmI&pd_rd_i=B09542G9ZN&pd_rd_w=CSpTa&content-id=amzn1.sym.9c76da3e-1986-461f-80fe-90d97a5b2d1f&pd_rd_r=91c00bd7-5e69-4f58-b999-cebba9366fb9&th=1 What I like about cotton rounds is that they hold the fragrance well and give me something I can come back to later. I can spray one, put it aside, and smell it again an hour, three hours, or even several hours later. That gives me a much better idea of how the fragrance changes over time instead of judging everything from the opening. Another thing I do is place the sprayed cotton round in a small plastic food-storage zip bag. That lets me take it home, keep different fragrances separate, and revisit them later when I want to study the drydown or get a sense of how much scent is still hanging around. I wouldn’t treat that as a perfect real-world longevity test, because sealing it in a bag slows normal evaporation, but it’s a great way to preserve the sample and compare how different fragrances evolve over time.