The number one reason to clean your laundry dryer vents is that it prevents fires. Statistics estimate that clothes dryers are associated with approximately 10,000 fires per year (Canada Wide). Lint build up in the dryer or in the dryer duct blocks the natural air flow. This results in the dryer over heating and at times catching on fire. According to recent industry studies, an excessively clogged dryer vent will be less efficient and therefore will cost you more on energy bills. Manufactures recommend that you clean your dryer ducts once a year. Not doing so can cause your machine to break and could void your machines warranty.