blower http://www.adorama.com/alc/taginfo/blower Article: Clean it up!.How to keep your lenses and filters smudge- and scratch-free <p><span style="font-size: small;">The best way to keep lenses and filters clean is not to get them get dirty in the firstplace. This may sound trite, but every cleaning carries with it a very small risk ofcausing problems. </span></p> http://www.adorama.com/alc/article/8110