In a perfect world, pests wouldn't invade gutters, because in that perfect world, homeowners would diligently maintain their storm drainage systems. But the fact is that, despite the critical importance of gutter maintenance, plenty of people avoid it, not only because it's a hassle, but also because climbing a ladder up to the roofline can be genuinely hazardous. In fact, hundreds of people die each year—and an estimated 200,000 visit the emergency room—as a result of ladder-linked accidents. True, you can always pay a pro to assume the responsibility, but for a task that needs to be done at least twice per year, the associated costs can be prohibitively high. So, unwilling to do it themselves and unable to afford help, countless homeowners neglect their gutters, letting clogs form that encourage the spread of pests.