Does road salt shorten the life of cabin air filter?

Thanks for your answer ... it's starting to make sense. I guess that's why car exteriors are dirtier in the winter months than other times during the year. My initial thought was that the manufacturer recommends replacing the filter after 12 months or 20,000 miles and I would have thought that included periods of driving through dusty environments. After that incident with the dealer, I went on-line and purchased several filters. I also watched a video on how to replace it myself. I'm amazed at how easy it was and I'll deal with it the next time this issue happens again. Thank you.