Optics cleaner removes loose dust, dirt

LensPen cleans all kinds of optics and provides two easily accessible working ends. Device is small enough to clip inside a pocket or toss in a work bag. Slide out the brush-end first and use to remove all loose dust and dirt from the lens or eyepiece. The retractable brush, made from natural goat hair, is gentle and does not damage optics. To clean fingertips, remove the cap from other end and use flexible chamois tip, which matches surface shapes and contours.

http://www.lenspen.com