Day after day, largely unnoticed, gutters perform a critically important role by channeling storm water and snowmelt a safe distance away from your home. At least, that's how it's all supposed to work. But for gutters to do their job, you must do yours. That is, twice a year (more often on a densely wooded lot), you have to inspect and clear gutters of any leaves, twigs, and other debris. If you fail to do so, it's only a matter of time before…