water filter getting dried out---still good?

We one of these filters about 6 months ago.

http://www.campingworld.com/shopping/item/tastepure-kdf-carbon-water-filter/18478

Used it and now back home for about a month. I'm sure it has dried out sitting in a storage bin and wondering if it's OK to sanitize just like rest of water system?

If not what do you do with yours when you don't use it for awhile?