An image of woman holding her nose.  Musty, moldy odor to clothes after the drying cycle can be a sign of a poorly-functioning dryer exhaust system.
Why do my clothes smell musty after drying?
If your laundry area, your dryer or your clothes have a musty, moldy odor to them after the drying cycle, this can be a sign of a poorly-functioning dryer exhaust system.

The dryer exhaust vent is likely obstructed or clogged with excessive lint, preventing the moisture from escaping. This could be a warning sign that the dryer exhaust vent needs some attention. The only way to eliminate that ‘wet dog odor’ from your clothing is to clean the dryer exhaust duct as well as the exterior vent.

Should I be worried if my dryer smells moldy?
A properly-functioning dryer exhaust system allows moisture to escape to the outside, whereas a clogged dryer exhaust system traps the moisture, preventing it from escaping. This creates a damp environment, allowing mold and mildew to thrive. What you’re left with is a musty, moldy odor to your laundry following the drying cycle.

This mildew growth can be harmful to breathe and can create health issues. Some symptoms include respiratory issues like wheezing, nasal and sinus congestion. If mildew is not removed, it will continue to grow and these symptoms may worsen. In order to correct this, the dryer exhaust system must be cleaned so that moisture can escape.

There are numerous service companies that specialize in duct and vent cleaning. If you prefer to do it yourself, please refer to this blog for helpful do-it-yourself tips and information: Clogged Dryer Vents and Duct Cleaning.
Clogged ventDuct cleaning