Neglecting dryer vent cleaning leads to increased fire hazards due to lint buildup. Lint, dust, fuzz, and debris can become caught and build up in dryer vents. You may notice a burning smell. This debris is highly flammable and can catch fire from the heat of the dryer. Clogged dryer vents are responsible for thousands of household fires every year. Whether or not your dryer is in good condition, a fire can still spread to the rest of your home.