Most bad fragrance purchases happen for the same reason. Someone smells a strip in a store, likes it, buys the bottle, and then wears it three days later to find it smells nothing like they remembered. This isn't bad luck. It's just how fragrance works, and there's a way around it.
A strip is not your skin
Paper doesn't have oil, warmth, or a pulse. A fragrance behaves completely differently on a card than it does on you, because so much of how a scent develops depends on your individual skin chemistry — your pH, how dry or oily your skin runs, even what you ate that week can nudge things slightly. Two people can spray the exact same fragrance and have it read differently within an hour. So a strip test can tell you whether you like the opening. It can't tell you whether you'll like wearing it.
Give it real time
The honest way to test a fragrance is to put it on your skin and then go do something else for a few hours. Run an errand. Go to work. Forget about it for a while and then check back in. What you're looking for is how it moves through its stages — the bright opening, the settled middle, whatever's left by evening. A fragrance that's only ever been smelled for ninety seconds in a shop hasn't really been tested at all.
This is the whole reason samples exist, and honestly why we built our Sample Discovery sets the way we did. A 2ml vial won't tell you everything a full bottle would, but it will absolutely tell you whether something is worth the full bottle in the first place — without spending $150 to find out you don't actually like how it dries down.
Test one thing at a time
It's tempting to try four or five fragrances back to back, especially if you're finally getting around to sampling a whole set. Don't. Your nose gets overwhelmed fast, and after the second or third spray you're not really smelling anything clearly anymore — you're just smelling "perfume" in a general sense. If you're testing multiple things, space them out over separate days, or at minimum separate wrists with hours between.
Trust the version that shows up later
If you're choosing between two fragrances and can't decide, wait until evening and see which one you're still thinking about. The one that's still on your mind eight hours after you put it on is usually telling you more than either one did in the first five minutes.