Yes, dryer vent cleaning is absolutely worth the money. The service is relatively inexpensive and quick, and the value and peace of mind you get for the investment make it worthwhile. A clogged dryer vent is a significant fire risk, so the average $140 you might pay to have your dryer vent cleaned once a year could save you thousands of dollars in home repairs if the clog causes a fire. Additionally, some homeowner’s insurance companies will charge you a lower premium if you provide receipts of annual dryer vent cleanings by a professional.

Call 911 immediately. If you have a fire extinguisher or fire blanket near the laundry room, you can attempt to extinguish the fire, but don’t open or touch the dryer. If you can’t put the fire out, evacuate yourself, your family, and your pets from the house, closing the laundry room door behind you. Turn off the electricity to your home via the outside fuse box, then wait for the fire department. After a dryer fire, have your home’s electrical system inspected to make sure there isn’t any damage.

The frequency of cleaning your dryer depends on how often you use it. For regular households, it is recommended to clean the lint trap after each load of laundry. Additionally, thorough cleaning of the dryer—lint trap, drum, and exterior—should be done every few months. It's important to pay attention to the vent system as well. Ideally, it should be cleaned at least once a year, or six months if your dryer takes care of huge loads often, or more frequently if you notice reduced drying efficiency.

Depending on how much you use it, your dryer should be disinfected about every six to 12 months, especially if you see frequent buildup of lint or evidence of stains from fabric bleeding or ink. 

Other signs you should sanitize your dryer more often are overheating, improper drying, excessive humidity, or if you notice a strange odor when it’s running.