Yea, and have you had the air filter changed before? From you question I assume you haven't changed it yourself. If its been 6 months (IMHO) go ahead a get a new one from your local Auto parts store and change it.

Also, I usually have some debris in the bottom of the box and I just wipe it out with a wet paper towel when I'm putting in a new filter. Don't forget to clamp back all 4 of the clamps as for some reason (It's hard to see I guess) people tend to miss the one that’s in the back toward the firewall side of the air box.