The perfect shot, but when developing, you realize that a speck of dust has marred the image. The Lenspen reliably removes the smallest dirt particles from lenses and filters. This way, next time you'll capture that perfect shot! It is particularly durable, as no liquid can dry out or leak during dry cleaning. Ready to use immediately, as the screw cap ensures the automatic activation of the velvet surface, eliminating the need for extra activation of the fibers.