Signs of Vent Clogging: When you run a load of laundry in your dryer-that would normally be dry after a single cycle and it remains damp, it is a good first sign of a clogged vent. If the dryer is clogged, the moisture stays in the dryer. This leads to damp clothes. If it happens often enough, a musty smell develops in the clothes.
If it takes longer than 40 minutes to dry your clothes, the vent could be becoming clogged and should be addressed before it becomes an issue.
More than 15,000 dryer fires occur every year in the United States alone. Some lint always gets through the lint filter and settles in the exhaust hose. As this builds up, it leads to reduced drying efficiency. In the worst cases, it can build up and catch fire. The less often that the filter is cleaned, the quicker that build-up occurs.
If your dryer is not working properly, call an appliance contractor. You might be surprised when you see the amount of lint and debris they pull out of your vent.
After it is cleaned it out, the technician runs a camera up through the vent so you can see that it is clear.