I also keep my scents in the fridge and use them the following year.I use Bob Kirschner's scents and when you call to place an order he's the person you talk with.He told me as long as you keep it cool it will work just as well if not better. I've had great results using his scents.I made about a 200 yard drag line and had a big 10 pointer follow it right in.He stopped and was looking for the hot doe,giving me a perfect broadside shot.