Prevent Gutter Clogging With Slinky; No Expensive Gutter Guards! By indyman13 in LivingCleaning5,443233Save PDFFavoriteIntroduction: Prevent Gutter Clogging With Slinky; No Expensive Gutter Guards! Use slinky to prevent gutter clogging. Clean out at end of season. Stretch each slinky about 8 feet and stuff about 3 inches into the downspout.