A dryer that runs a complete cycle but leaves clothes damp wastes electricity, wastes your time, and usually signals a fixable problem. Start with the simple explanations before assuming the worst.
Check the Lint Trap First
A full lint trap restricts airflow through the dryer drum. Without adequate airflow, moisture has nowhere to go, and clothes stay damp. Clean the lint trap before every load — it takes five seconds and prevents one of the most common dryer complaints.
Beyond the trap, the lint screen itself can develop a film from dryer sheets that blocks airflow even when it looks clean. Run the screen under water — if water beads on the surface instead of flowing through, scrub it with a brush and dish soap, rinse, and let it dry.
The Exhaust Duct
This is the most overlooked cause of poor drying. The exhaust duct runs from the back of the dryer to an exterior vent. Over time, lint accumulates inside the duct, and if the duct has bends or kinks, buildup accelerates. A partially blocked duct means hot moist air can't escape, the dryer can't complete the drying process, and heat builds up inside the machine.
To check it, disconnect the duct from the back of the dryer and run a cycle. If clothes dry much better, the duct is the problem. Duct cleaning kits are available at hardware stores, but a professional duct cleaning is more thorough and takes care of the entire run to the exterior.
Overloading the Drum
A dryer drum needs room to tumble clothes through the heated air. When the drum is packed too full, items in the centre don't get adequate airflow. The outer layer dries while the middle stays damp. Running a smaller load almost always produces better results than forcing everything in at once.
Heating Element or Igniter
If the lint trap is clean, the duct is clear, and loads are reasonable in size, but clothes are still consistently damp, the heating system likely needs attention. Electric dryers have a heating element that can burn out partially — producing some heat but not enough to fully dry a load. Gas dryers can have a weakening igniter that lights the burner intermittently rather than reliably.
Either of these issues requires a technician. The diagnostic is straightforward and the repair is usually completed the same day.