Regular gutter cleaning is crucial to maintaining good gutters. A gutter clogged with leaves, sticks and other debris can cause a leaky roof or water damage to the interior or exterior of your home. They say gunked-up gutters also make nice homes for pests, rodents, mold and honeycombs from bee infestations. This is why it is necessary to have a professional clean your gutters at least twice a year to prevent any nightmares.