According to experts, dryer duct cleaning should take place once a year. Is this enough? If your family tends to wash a lot of laundry, then once a year may not be enough. When you use your dryer more often, you must perform preventative maintenance more often as well.
The Department of Energy states that "...the average American family washes about 300 loads of laundry per year...".* All that lint adds up! If you have any kind of blockage, the lint will start building up quickly and disaster may strike before the next cleaning.
When you have your next dryer duct cleaning done, ask the cleaner if there was more than usual, and if so, maybe you should stay on the safe side by scheduling your next appointment sooner. While they are there, ask about installing DryerWallVent.
*NPS Commercial Services