Yup, the vet said that alcohol is the main transporting agent for the scent and that I should let it evaporate before Pissy McWetwet goes in her carrier.
Feliway works, but you want to spray down the blanket/towel/pad in the carrier about 1/2 hour before you put her in there for her trip. The aerosol has to burn off, and the main chemical needs that time to establish itself in the fabric. If you do that, it will help to calm her.
No...little "Pee Pee Rodriguez" wet the carrier again. She only made it as far as the elevator this time. At the Vet's they gave me a special spray that's supposed to relieve anxiety, and some big absorbent pads to line the carrier with to try during her next outing.