Does Car-Cabin Temperature Affect How Quickly Fragrance Evaporates?

Yes, directly, and this one fact is the foundation of everything else this winter cluster covers. Fragrance is a liquid, and like any liquid, it turns into vapour - which is what lets you smell it - through evaporation, and evaporation is temperature-driven. Warm air holds more energy, so liquid molecules escape into it faster; cold air holds less, so the same liquid releases its scent more slowly. This is not specific to fragrance - it is the same reason a wet road dries faster on a hot afternoon than on a cold one - but it applies directly to both formats a SOSA car scent ships in. In a Spray, most of the fragrance releases quickly on contact regardless of temperature, but how long that initial burst lingers in the cabin air afterwards is still affected by how warm or cold that air is. In a Hanging Diffuser, the effect is much more visible, because the whole product works by slow, continuous evaporation over weeks - cabin temperature directly sets the pace of that entire process, both how strong it reads at any given moment and how long the 12ml fill lasts overall. Once you hold this one rule, the rest of this cluster becomes a set of specific examples rather than separate puzzles: a car reads weaker on a cold morning because the cabin is at its coldest point of the day; the same bottle can read noticeably stronger once the heater has run for a while, because warm, sealed, recirculating air speeds evaporation back up fast; and a Hanging Diffuser genuinely lasts longer in winter than in summer, because less of its oil evaporates on any given cold day. It is also worth noting that cabin temperature matters more than outside temperature - a cold day with the heater blasting and the windows shut can create a genuinely warm cabin, while a mild day with the windows down for a long highway drive can keep the cabin relatively cool despite pleasant weather outside. If you want a scent that behaves predictably across all of this rather than swinging noticeably with the temperature, a dry, earthy scent like Vetiver tends to read consistently at both ends, and the SOSA Safar gives you a direct way to counter a temperature swing with an adjustable speed rather than relying on the cabin alone.