Why is dryer vent cleaning important? Clogged dryer vents can be costly to your home or business. Dryer vent cleaning is extremely important for the following reasons: According to FEMA, almost 3,000 residential fires are reported every year which are directly related to dryers. Of these, 34 percent of residential clothes dryer fires were caused by dirty dryer vents or If the dryer vent is not clean, it will hinder the dryer’s ability to properly dry your clothing. You may have to use multiple cycles to get your clothes dry which uses more energy and makes your dryer work harder.